Tank waterproofing

When it comes to water tank waterproofing, there is no room for error. Whether it’s a concrete tank, a cistern, or an underground reservoir, cracks and leaks can compromise structural safety, water quality, and operational reliability.

MPM offers high-performance tank waterproofing solutions designed for extreme conditions, aggressive liquids, and constant hydrostatic pressure. With over 70 years of experience in advanced materials, our systems are trusted by professionals across the globe.

Concrete water tank waterproofing that lasts for decades

The Starflex line is designed to perform where conditions are most demanding. Cold-applied systems that bond to damp or wet concrete and stay elastic through thermal cycles, structural movement and continuous water pressure.

Starflex solves:

• Concrete water tank waterproofing – full impermeability even under permanent water head
• Underground tank waterproofing – protects against hydrostatic pressure from all sides
• Cement tank waterproofing – bonds directly to cement substrates, no removal of existing layers required
• Potable water tank lining – certified for direct contact with drinking water
• Wastewater and industrial tank protection – resistant to diluted acids, alkalis and aggressive effluents
• Cistern and reservoir restoration – applied over existing failed membranes, saving excavation cost and time

How Starflex compares to traditional sheet membranes at a glance

A complete waterproofing system for tanks, not just a coating

Waterproofing a tank is a system problem. A single-product approach usually fails at the details, such as around pipe penetrations, at expansion joints, on curved walls and domed roofs. The Starflex range covers the complete envelope.

• Primers – bond to damp concrete, metal, existing waterproofing layers and practically any site substrate
• Elastic liquid membranes – crack-bridging, elastomeric, designed for continuous immersion and dynamic movement
• Protective coatings – resistant to elevated temperatures, UV exposure, and concentrated chemical attack
• Detail solutions – for pipe penetrations, upstands, vents and complex geometry where seamless coverage is non-negotiable
• All systems are cold-applied – no naked flame, no hot works permit required. Application by airless spray, trowel or roller, optimising time on site and delivering consistent, professional results.
• Certified for demanding environments, including drinking water contact and wastewater treatment, so your specification is defensible, not just effective.

Our certifications

Applications: every tank type, every condition

MPM Starflex systems have been specified and installed across the full spectrum of water and industrial tank structures.

Depth of system knowledge
70 years of formulation experience means our technical team understands what goes wrong on site, and has built the solutions to prevent it. We specify by substrate, exposure class and service condition, not by product number.

Certified performance
BBA, EOTA, LCA, CAM, LEED and EPD-certified systems. Every claim is backed by independent test data. When your client or regulator asks for documentation, we deliver it.

Application versatility
Cold-applied systems that cure in all seasons. No dependency on weather windows or hot-works permits. Applicators with our products can work continuously, protecting their programme and their client’s budget.

Training that produces results
Certified applicators trained by MPM deliver installations that perform. We invest in your team so the system performs as specified.