Poseidon Waterproof Membrane Paint (12KG) - Spray / Roller

£119.00 GBP

~~£170.00 GBP~~ £119.00 GBP

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Product Description – Poseidon 12kg (Large-Scale Waterproofing)

Even a storm conjured up by Poseidon himself couldn’t get past this powerhouse of waterproofing. Engineered for large-scale bathroom, steam room, and wetroom projects, Poseidon 12kg is the professional’s choice when only total vapour protection will do.

Ideal For: Big residential bathrooms, commercial wetrooms, gyms, spa facilities, and large tiling projects.

How’s It Applied? Spray, roller, or brush — Poseidon 12kg offers maximum flexibility for fast and efficient coverage across large surface areas.

What Makes Poseidon Unique? Unlike traditional tanking systems, Poseidon is a complete vapour block that doesn’t require corner reinforcements, saving time and labour while ensuring watertight security.

Techy Corner: Poseidon is a polymer-based, liquid-applied waterproofing membrane that dries into a seamless, flexible coating. The 12kg can is designed for contractors and bigger jobs, delivering maximum coverage and long-term reliability.

Details
Uses
Technical Data
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FAQ

Key Details – Poseidon 12kg Waterproofing Membrane

Drying Protection – Keep Poseidon free from water or liquid contact during the drying phase to ensure a flawless vapour block.
Easy Cleanup – Simply clean all tools and equipment with cold water after application.
Surface Protection – Protect the cured Poseidon membrane from damage until tiling or finishing layers are installed.
Ventilation Matters – Ensure good ventilation in cases of high humidity for optimal drying.
Primer Use – On moisture-resistant boards or dusty surfaces, use Supergrip primer before applying Poseidon for maximum adhesion.
Not Suitable For:Bitumen or asphalt-based surfacesAreas with continuous water contact or standing water pressureMoving cracks or highly flexible substratesSurfaces unsuitable for water-borne coatings

Poseidon 12kg is engineered for large bathrooms, spa facilities, gyms, and high-use wetrooms, giving contractors the ultimate vapour-proofing system for big projects.

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:12kg
Ideal for:

Bathrooms
Wetrooms
Showers
Kitchens
Any area with regular water exposure

This product Adheres to

Concrete and concrete blocks
Bricks
Cement based plaster
Plaster (With Supergrip primer)
Water-resistant plasterboards (with primers)
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.

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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