• Poseidon is a liquid applied wet room bathroom waterproofing
  • Paint on waterproof paint
  • Liquid applied bathroom waterproofing membrane used behind tiles and in wet areas to prevent water damage
  • Roll applied waterproof paint
  • bathroom water proof paint before tiling
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Poseidon Waterproof Membrane Paint (7KG) - Spray / Roller

Poseidon Waterproof Membrane Paint (7KG) - Spray / Roller

£70.00 GBP
£100.00 GBP £70.00 GBP
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Even a storm conjured up by Poseidon himself couldn’t break through this expert damp proofer. Poseidon is the ultimate vapour block, designed to protect wet areas and high-moisture environments with unrivalled reliability.

✅ Ideal For: Bathrooms, steam rooms, and wet rooms prior to tiling
✅ Application: Spray, roller, or brush – quick and easy to apply
✅ Unique Advantage: A complete vapour block with no need for corner reinforcements

Why Choose Poseidon?

  • Total Vapour Block – Stops moisture in its tracks, ensuring your tiling and finishes stay protected.
  • Flexible Membrane – Dries to form a durable, seamless, and flexible barrier that adapts to building movement.
  • Quick & Easy – Apply by spray, roller, or brush for fast coverage and efficient installation.
  • Professional Protection – Ideal for bathrooms, wet rooms, and steam areas where water and vapour control are critical.

Techy Corner

Poseidon is a polymer-based, liquid-applied membrane that cures into a robust, flexible film. Once applied, it delivers long-term waterproofing and vapour control, making it an essential choice for professionals working in high-moisture environments.

⚡ Poseidon: Because even the gods can’t get past it.
  • Details
  • Uses
  • Technical Data
  • Download
  • FAQ

Key Details – Poseidon Vapour Block

  • Application Methods: Spray, roller, or brush for quick and even coverage.
  • Drying Phase: Allow to dry undisturbed – keep free from water or liquid contact until fully cured.
  • Easy Cleanup: Simply wash tools and equipment with cold water after use.
  • Durable Protection: Once cured, Poseidon forms a robust, flexible membrane that should be protected until tiling or finishing layers are applied.
  • Ventilation: Ensure good airflow during application, especially in areas with high humidity, for the best results.
  • Smart Compatibility: Designed for a wide range of surfaces, though not suitable for:Bitumen or asphalt-based substratesSurfaces with continuous water contact or standing water pressureMoving cracks or highly flexible jointsNon-compatible coatings or unsuitable finishes

Suitable Applications – Poseidon Liquid Waterproofing Membrane

Poseidon is specially developed for bathrooms, wetrooms, and steam areas, providing a complete vapour block that guarantees long-term protection before tiling.

Ideal substrates include:

  • Concrete & Concrete Blocks – Creates a watertight seal over porous bases.
  • Brickwork – Stops water ingress and prepares walls for a lasting tile finish.
  • Cement-Based Plaster & Water-Resistant Plasterboards – Strengthens weak points and ensures reliable waterproofing.
  • Existing Tile Floors & Walls – Bonds over existing tiles to refresh and reinforce waterproofing layers.
  • Wetroom-Specific Substrates – Compatible with modern wetroom construction systems, ensuring full compliance and durability.

Poseidon is the ultimate choice for waterproofing bathrooms and wetrooms — delivering a seamless, flexible membrane that keeps moisture exactly where it belongs.

Product Collection:Poseidon
Applied By:Airless Spray machine, roller or paintbrush
Colour: Blue
Size:7kg

Ideal for:

  • Bathrooms
  • Wetrooms
  • Showers
  • Kitchens
  • Any area with regular water exposure

Product Adheres to 

  • Concrete and concrete blocks
  • Bricks
  • Cement based plaster
  • Plaster (With Supergrip primer)
  • Water-resistant plasterboards
  • Existing tile floors and walls
  • OSB
  • Plywood
  • Chipboard
  • Gypsum Moisture Board (With a primer)
  • Hardie Board (With a primer)
  • Bluclad
  • Other substrates suitable for wetrooms

Technical Data Sheet

Safety Data Sheet

Install Guide

At Intelligent Membranes, we help architects, contractors, retrofitters and self-builders achieve airtightness and waterproofing targets with liquid-applied systems. Our flagship airtight system, Passive Purple®, is airtight at all times yet breathable when the building fabric needs to release vapour — we call this intelligent breathability.

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Why Choose Poseidon?

Poseidon is a high-performance, polymer-based waterproofing coating that cures to a flexible, seamless membrane with exceptional crack-bridging properties. Designed for use in showers, bathrooms, steam rooms, and wet areas, it provides reliable waterproof protection before tiling. Once applied, Poseidon forms a durable barrier that accommodates movement within the substrate, ensuring long-term protection in areas exposed to constant moisture and thermal stress.

Shipping & returns summary

We, at Intelligent Membranes, would like you to be 100% satisfied with your purchase and our service. In the unfortunate event of any item being unsuitable or wrong, please read the following for advice on returning goods to us.

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Watch Poseidon Waterproof Membrane Paint (7KG) - Spray / Roller in Action