{"id":18443,"date":"2026-06-22T09:51:18","date_gmt":"2026-06-22T09:51:18","guid":{"rendered":"https:\/\/www.mpmsrl.com\/?page_id=18443"},"modified":"2026-06-22T09:51:18","modified_gmt":"2026-06-22T09:51:18","slug":"interior-waterproofing-system","status":"publish","type":"page","link":"https:\/\/www.mpmsrl.com\/en\/interior-waterproofing-system\/","title":{"rendered":"Interior waterproofing system"},"content":{"rendered":"[vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;]<nav class=\"ug-custom-breadcrumb \"><a href=\"https:\/\/www.mpmsrl.com\/en\/\">Homepage<\/a> <span class=\"ug-separator\">><\/span> <a href=\"https:\/\/www.mpmsrl.com\/en\/waterproofing\/\">Waterproofing<\/a> <span class=\"ug-separator\">><\/span> <a href=\"https:\/\/www.mpmsrl.com\/en\/construction-waterproofing\">Construction Waterproofing Systems<\/a><\/nav>[\/vc_column][\/vc_row][vc_row type=&#8221;full_width_background&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bg_color=&#8221;#ffffff&#8221; scene_position=&#8221;center&#8221; top_padding=&#8221;5%&#8221; constrain_group_1=&#8221;yes&#8221; bottom_padding=&#8221;5%&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; shape_type=&#8221;&#8221; gradient_type=&#8221;default&#8221;][vc_column column_padding=&#8221;padding-3-percent&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;right&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h1><b>Interior waterproofing system<\/b><\/h1>\n<p><b>Water in your basement is not just a nuisance \u2014 it is structural damage in slow motion.<\/b><\/p>\n<p><span style=\"font-weight: 400;\">When excavation is not an option, an interior waterproofing system is the professional answer. MPM STARFLEX liquid membranes seal walls and floors from inside \u2014 even on wet or damp concrete \u2014 without disrupting the perimeter or halting operations.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Over 70 years of Italian chemical expertise. Certified durability up to 30 years.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><b>On this page:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><a href=\"#what-is\">What is an interior waterproofing system \u2014 and when do you need one?<\/a><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><a href=\"#starflex\">Interior waterproofing products: the STARFLEX range<\/a><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><a href=\"#mpm\">Why contractors and engineers choose MPM interior waterproofing<\/a><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><a href=\"#application-fields\">Interior waterproofing system: application fields<\/a><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><a href=\"#faqs\">FAQs<\/a><\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><b><a id=\"what-is\"><\/a>What is an interior waterproofing system \u2014 and when do you need one?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">An interior waterproofing system is a solution applied from inside a building to stop water from penetrating through basement walls, floors, or underground structures. The membrane is applied to the internal face of the structure: no excavation, no disruption to the perimeter.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It is the right choice when:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">the building is already standing and external excavation is prohibitively expensive or disruptive<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">the project is a renovation or retrofit of an existing basement<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">urban density, adjacent structures, or active infrastructure make exterior access impractical<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">speed of execution is critical and downtime must be minimised<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Interior waterproofing does not replace exterior waterproofing where that is feasible. It is the professional&#8217;s answer when it is not.<\/span><\/p>\n<h3><b>Hydrostatic pressure: the main cause of basement water infiltration<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Groundwater does not wait for cracks to appear \u2014 it creates them. As water accumulates around a foundation, it builds hydrostatic pressure that forces its way through any imperfection in concrete: a hairline crack, a construction joint, a pipe penetration. Over time, the result is water ingress, reinforcement corrosion, spalling, and mould.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A correctly specified interior waterproofing system is the first line of defence. The membrane must resist water pressure from the negative side \u2014 from within \u2014 which demands specific chemistry and adhesion performance that standard coatings do not provide.<\/span><\/p>\n<h2><\/h2>\n<h2><b><a id=\"starflex\"><\/a>Interior waterproofing products: the STARFLEX range<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Not every waterproofing membrane performs from the inside. Interior applications present conditions that external systems are not designed for: water pressure acting in reverse, limited airflow during curing, substrates that are rarely dry. Every product in the STARFLEX range addresses these constraints directly.<\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<strong>Starflex HYBRID<\/strong><\/p>\n<p><span style=\"color: #919191;\">Liquid membrane for wet basement walls<\/span>[\/vc_column_text][image_with_animation image_url=&#8221;10509&#8243; image_size=&#8221;medium&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;none&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221; max_width=&#8221;100%&#8221; max_width_mobile=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">When the substrate is wet and there is no time to wait, STARFLEX HYBRID is the answer. This single-component aliphatic polymeric membrane bonds directly on wet or damp concrete in some cases also without a primer. Rapid cure even at low temperatures, outstanding elasticity and adhesion \u2014 the complete package for interior retrofit projects where site conditions are never ideal.<\/span>[\/vc_column_text][\/vc_column][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<strong>Starflex H-ZERO<\/strong><\/p>\n<p><span style=\"color: #919191;\">Polyurethane waterproofing membrane for interior use<\/span>[\/vc_column_text][image_with_animation image_url=&#8221;13691&#8243; image_size=&#8221;portfolio-thumb&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;none&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221; max_width=&#8221;100%&#8221; max_width_mobile=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">STARFLEX ONE is a single-component elastic bituminous water-based membrane built for high adhesion even on wet or irregular concrete. UV-resistant, extremely flexible, easy to apply \u2014 a practical, cost-effective solution for basement maintenance and restoration projects<\/span>[\/vc_column_text][\/vc_column][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<strong>Starflex C<\/strong><\/p>\n<p><span style=\"color: #919191;\">Cementitious waterproofing for basement walls and pools<br \/>\n<\/span>[\/vc_column_text][image_with_animation image_url=&#8221;16594&#8243; image_size=&#8221;medium&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;none&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221; max_width=&#8221;100%&#8221; max_width_mobile=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">When a mineral-based interior waterproofing system is preferred \u2014 for compatibility, regulatory, or substrate reasons \u2014 STARFLEX C delivers. This bi-component elastic cementitious mortar cures on damp or cold surfaces, bridges cracks, and bonds firmly to concrete and masonry. Ideal for swimming pools, water tanks, and basement walls with constant water exposure.<\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<strong>Starflex ULTRA (FR)<\/strong><\/p>\n<p><span style=\"color: #919191;\">Polyurea waterproofing system for underground structures<br \/>\n<\/span>[\/vc_column_text][image_with_animation image_url=&#8221;13718&#8243; image_size=&#8221;full&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;none&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221; max_width=&#8221;100%&#8221; max_width_mobile=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">Certified durability up to 30 years. Wet-on-wet application. Rain-safe after 1 hour. Fire-certified B-roof T4. STARFLEX ULTRA is the benchmark product for underground structures and foundations that demand maximum long-term reliability \u2014 the interior waterproofing system where failure is not an option.<\/span>[\/vc_column_text][\/vc_column][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<strong>Starflex ONE<\/strong><\/p>\n<p><span style=\"color: #919191;\">Waterproof coating for basement concrete repair and maintenance<\/span>[\/vc_column_text][image_with_animation image_url=&#8221;15075&#8243; image_size=&#8221;full&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;&#8221; border_radius=&#8221;none&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221; max_width=&#8221;100%&#8221; max_width_mobile=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<span style=\"font-weight: 400;\">STARFLEX ONE is a single-component elastic bituminous water-based membrane built for high adhesion even on wet or irregular concrete. UV-resistant, extremely flexible, easy to apply \u2014 a practical, cost-effective solution for basement maintenance and restoration projects.<\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;full_width_background&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bg_color=&#8221;#ffffff&#8221; scene_position=&#8221;center&#8221; top_padding=&#8221;5%&#8221; constrain_group_1=&#8221;yes&#8221; bottom_padding=&#8221;5%&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; shape_type=&#8221;&#8221; gradient_type=&#8221;default&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<table>\n<tbody>\n<tr>\n<td><b>Product<\/b><\/td>\n<td><b>Applies on wet substrate?<\/b><\/td>\n<td><b>Key advantage<\/b><\/td>\n<td><b>Best for<\/b><\/td>\n<\/tr>\n<tr>\n<td><b>STARFLEX HYBRID<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Yes \u2014 even with no primer<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Bonds on wet concrete, rapid cure<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Retrofit, difficult site conditions<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>STARFLEX ONE<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Yes if humid<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Easy application, UV-resistant<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Maintenance and restoration<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>STARFLEX C<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Yes \u2014 cures on damp surfaces<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Cementitious, crack-bridging<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Pools, tanks, masonry basements<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>STARFLEX H-ZERO<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Yes<\/span><\/td>\n<td><span style=\"font-weight: 400;\">High elasticity, multi-substrate<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Moving structures, confined spaces<\/span><\/td>\n<\/tr>\n<tr>\n<td><b>STARFLEX ULTRA (FR)<\/b><\/td>\n<td><span style=\"font-weight: 400;\">No<\/span><\/td>\n<td><span style=\"font-weight: 400;\">30-year certified durability<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Critical underground structures<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text][nectar_btn size=&#8221;medium&#8221; button_style=&#8221;regular&#8221; button_color_2=&#8221;Accent-Color&#8221; icon_family=&#8221;none&#8221; text=&#8221;\u2192 Request the full STARFLEX product brochure&#8221; url=&#8221;#form&#8221; margin_bottom=&#8221;10&#8243;][divider line_type=&#8221;No Line&#8221; custom_height=&#8221;40&#8243;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><b><a id=\"mpm\"><\/a>Why contractors and engineers choose MPM for interior waterproofing<\/b><\/h2>\n<p>&nbsp;<\/p>\n<h3><span style=\"font-weight: 400;\">It bonds on wet concrete \u2014 where most products fail<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Interior waterproofing often means working in a damp, poorly ventilated basement \u2014 exactly the conditions that compromise standard coatings. STARFLEX HYBRID and STARFLEX ONE are specifically formulated to maintain full adhesion and performance on wet substrates.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Seamless liquid membrane: no joints, no weak points<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A liquid-applied interior waterproofing membrane conforms to every surface it touches: corners, pipe penetrations, irregular walls, construction joints. There are no laps, no overlaps, no seams where water finds a path through.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Certified performance: up to 30 years of documented durability<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Certified durability up to 30 years. Independent testing to ETAG 005, CE 1504, CAM, BBA, and Broof T4. More than 100 international certifications across the STARFLEX range. When an engineer or building inspector asks for proof, MPM provides documentation \u2014 not reassurances.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Made in Italy \u2014 70 years of applied chemistry, training and support included<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">MPM has been developing protective chemistry for construction since the 1950s. Five R&amp;D laboratories, over 40 certified products, production capacity exceeding 50,000 kg per day. Every STARFLEX membrane is manufactured in Italy \u2014 and the expertise comes with the product: training programmes, site visits, specification guidelines, and ongoing support from the technical team that knows these systems from the inside out.<\/span>[\/vc_column_text][nectar_btn size=&#8221;medium&#8221; button_style=&#8221;regular&#8221; button_color_2=&#8221;Accent-Color&#8221; icon_family=&#8221;none&#8221; text=&#8221;\u2192 Become a STARFLEX distributor: talk to our tech team&#8221; url=&#8221;#form&#8221; margin_bottom=&#8221;10&#8243;][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><b><a id=\"application-fields\"><\/a>Interior waterproofing system: application fields<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Any below-grade or internal surface exposed to water pressure, ground moisture, or sustained humidity is a candidate for STARFLEX interior waterproofing. These are the most common applications.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Waterproofing an existing basement from inside<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The most frequent application. Excavating around a standing building to waterproof from outside is expensive, disruptive, and often impossible in urban environments. Applying a STARFLEX system from inside stops infiltration without touching the perimeter \u2014 restoring the usability of the space with minimal disruption to the building or its occupants.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Foundation and retaining wall waterproofing \u2014 interior application<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Foundations face constant attack from ground moisture and hydrostatic pressure. Where the external face is inaccessible, an interior waterproofing membrane applied to the internal surface stops the ingress pathway \u2014 preventing reinforcement corrosion and the slow-motion structural damage that follows unchecked infiltration.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Underground car park and trafficked slab waterproofing<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Below-grade parking structures face water infiltration, chloride ingress from de-icing salts, and heavy mechanical load. STARFLEX HR-M \u2014 a self-levelling bi-component polyurea membrane with pedestrian and vehicle load resistance \u2014 provides combined structural and waterproofing protection for these demanding environments.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Swimming pools, water tanks, and water retention structures<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Constant water contact, chemical exposure, and the need for a permanently watertight finish make interior waterproofing essential for pools, water tanks, and treatment basins. STARFLEX C deliver the chemical resistance and permanent adhesion these applications demand.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Tunnels, underpasses, and underground infrastructure<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Structural movement, constant humidity, and sustained hydrostatic pressure define tunnel environments. MPM&#8217;s liquid membranes adapt to complex geometries without joints, providing long-term protection for infrastructure assets where maintenance access is infrequent and failure is costly.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Industrial facilities: pits, tanks, and buried structures<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Underground service pits, inspection channels, buried process tanks, and technical basements in industrial plants need protection against both water and chemical aggression. STARFLEX products are selected according to the chemical agents present \u2014 delivering combined waterproofing and chemical resistance in a single system.<\/span>[\/vc_column_text][nectar_btn size=&#8221;medium&#8221; button_style=&#8221;regular&#8221; button_color_2=&#8221;Accent-Color&#8221; icon_family=&#8221;none&#8221; text=&#8221;\u2192 Talk to our technical team &#8221; url=&#8221;#form&#8221; margin_bottom=&#8221;10&#8243;][divider line_type=&#8221;No Line&#8221; custom_height=&#8221;40&#8243;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><b><a id=\"faqs\"><\/a>Common questions about interior waterproofing<\/b><\/h2>\n<h3><i><span style=\"font-weight: 400;\">Can I apply an interior waterproofing system to an already-wet basement?<\/span><\/i><\/h3>\n<p><span style=\"font-weight: 400;\">Yes. STARFLEX HYBRID and STARFLEX ONE bond directly on damp or wet substrates \u2014 the condition found in most retrofit projects. Active leaks should be stopped with injection mortar before membrane application, but the presence of surface moisture alone does not prevent application.<\/span><\/p>\n<h3><i><span style=\"font-weight: 400;\">How long does an interior waterproofing system last?<\/span><\/i><\/h3>\n<p><span style=\"font-weight: 400;\">STARFLEX ULTRA FR carries certified durability of up to 30 years. All products in the range are designed for long-term performance, combining high elasticity, crack-bridging, and resistance to sustained water pressure. Actual service life depends on correct application and substrate condition.<\/span><\/p>\n<h3><i><span style=\"font-weight: 400;\">Does interior waterproofing work against hydrostatic pressure?<\/span><\/i><\/h3>\n<p><span style=\"font-weight: 400;\">Yes. STARFLEX polymer and cementitious systems both resist sustained negative-side water pressure. Product selection and application thickness are matched to the pressure level expected for each project.\u00a0<\/span><\/p>\n<h3><i><span style=\"font-weight: 400;\">Do I need a professional applicator for STARFLEX systems?<\/span><\/i><\/h3>\n<p><span style=\"font-weight: 400;\">For guaranteed performance and warranty coverage, yes. MPM trains and certifies applicators and supports projects from specification to completion. Using a trained applicator is the difference between a system that lasts 30 years and one that fails in 3.<\/span>[\/vc_column_text][divider line_type=&#8221;No Line&#8221; custom_height=&#8221;40&#8243;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><b>Stop water infiltration before it becomes structural damage<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Water damage does not announce itself. An interior waterproofing system applied now costs a fraction of structural repair later.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">MPM&#8217;s technical team will assess your project, identify the right STARFLEX system, and support the entire process \u2014 from specification through to completed application.<\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][nectar_btn size=&#8221;large&#8221; button_style=&#8221;regular&#8221; button_color_2=&#8221;Accent-Color&#8221; icon_family=&#8221;none&#8221; text=&#8221;\u2192Contact MPM for a technical consultation&#8221; url=&#8221;#form&#8221;][divider line_type=&#8221;No Line&#8221; custom_height=&#8221;30&#8243;][\/vc_column][\/vc_row][vc_row type=&#8221;full_width_background&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bg_color=&#8221;#adadad&#8221; scene_position=&#8221;center&#8221; top_padding=&#8221;8%&#8221; constrain_group_1=&#8221;yes&#8221; bottom_padding=&#8221;8%&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; zindex=&#8221;100&#8243; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;top_to_bottom&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; shape_type=&#8221;&#8221; gradient_type=&#8221;default&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_row_inner column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;center&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221; css=&#8221;.vc_custom_1728986654232{background-color: #adadad !important;}&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; centered_text=&#8221;true&#8221; desktop_text_alignment=&#8221;center&#8221; tablet_text_alignment=&#8221;default&#8221; 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