EAD 030352-00-0503
Colour(s)Blue
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
Painting Poseidon onto Bathroom Wall
Roll applied waterproof paint
30%Off!
SKU: IM/00POS12

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

Enquire Now Below

EAD 030352-00-0503

Product Collection: Poseidon
Applied By: Airless Spray machine. roller or paintbrush
Colour: Blue
Size: 12kg
Sample Available Here

Our waterproof paint for bathrooms and wetrooms is a high-performance solution specifically designed to protect areas exposed to constant moisture, such as behind tiles and other wet zones. This innovative membrane forms a durable, watertight barrier that prevents water ingress, ensuring long-lasting protection for the structural integrity of your wet areas.

Key Features and Benefits:

  • Ultimate Waterproofing: This paint creates an impenetrable layer, preventing water from seeping into walls, floors, or substructures in bathrooms, wetrooms, showers, and other high-moisture areas.
  • Easy Application: Applied directly behind tiles and wet areas, this waterproof paint is quick to use, making it perfect for both new constructions and retrofit projects. It adheres to a wide range of surfaces, including plasterboard, concrete, and timber.
  • Mold and Mildew Resistant: Designed to resist mold and mildew growth, it ensures a healthier, more hygienic environment by preventing moisture buildup that typically leads to these issues.
  • Seamless Protection: Unlike traditional waterproofing methods that involve membranes and multiple layers, our paint offers a seamless, uniform application without any joints or seams where water can penetrate.
  • Long-Lasting Durability: Built to last, this waterproof paint withstands the rigors of daily exposure to water and humidity, providing reliable protection for the life of the building.

Ideal for:

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

With our waterproof paint, you can ensure that your wet zones remain protected, keeping moisture where it belongs and maintaining the beauty and integrity of your tiled surfaces.

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

Poseidon liquid applied waterproof membrane is a polymer based coating which, after application, dries to a flexible membrane. It has high crack bridging properties, for the waterproofing of concrete and cement based surfaces in showers, bathrooms, steam areas, wet rooms that need waterproofing prior to tiling.

Apply with an airless paint spray machine, roller or paintbrush. No corner reinforcements are needed.

Any boards with an added water or moisture resistance will need a primer.

Enquire for product availability.

In Stock

Order within for same day dispatch*

Enquire Now BelowOrder Sample
×

You Will Need

    Enquire Now Below
  • Copagro Acrylic-DSP 310ml

    Copagro Acrylic-DSP 310ml

    From £5.00 + VAT Select options This product has multiple variants. The options may be chosen on the product page
    • Enquire Now Below
  • Poseidon Waterproof Membrane Paint (7KG) - Spray / Roller

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

    Add to basket

What is Poseidon?

How to Install This Product

Bathroom waterproofing- liquid applied waterproofing
Roll applied waterproof paint
Brush applied bathroom paint
bathroom water proof paint before tiling
Paint on waterproof paint
  • Key Details

    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 surfaces

      • Areas with continuous water contact or standing water pressure

      • Moving cracks or highly flexible substrates

      • Surfaces 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.

  • Description

    .

    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.

    Additional information

    Application

    Spray/Roll
    Placement

    Internal
  • Uses

    Suitable Applications – Poseidon 12kg Waterproofing Membrane

    Poseidon 12kg is specifically designed for large-scale bathroom and wetroom waterproofing projects, making it the go-to solution for contractors working on:

    • Commercial bathrooms – hotels, office blocks, and leisure centres

    • Student accommodation – multiple wetrooms sealed quickly and effectively

    • Spa facilities & wellness centres – saunas, steam rooms, and therapy areas

    • Gyms & sports centres – high-traffic shower rooms and changing areas

    • Healthcare facilities – hospital bathrooms and wetrooms requiring reliable long-term protection

    • Multi-residential housing – apartment blocks and housing developments with multiple bathrooms

    With its spray, roller, or brush application, Poseidon 12kg provides fast, professional coverage, ensuring every surface is airtight, watertight, and vapour-proof before tiling.

  • Data Sheets & Certificates
    Technical Data Sheet
    Safety Data Sheet
    Install Guide
  • Reviews

    Reviews

    There are no reviews yet.

    Be the first to review “Poseidon Waterproof Membrane Paint (12KG) – Spray / Roller”

    Your email address will not be published. Required fields are marked *

  • Delivery

    All delivery charges are included in the price of the products and are dependent on the products selected for purchase. This charge is based on delivery to mainland UK, excluding the Scottish Highlands & the Islands where additional shipping charges will apply. For more information read our delivery policy in full.

    Intelligent Membranes do not offer a next day delivery service.

    Intelligent Membranes aim for deliveries to be with the customer within 2 working days. During the festive period deliveries could take longer.

    Orders placed before 12pm will be dispatched the same day, any orders placed after 12pm will be dispatched the following working day

  • Returns

    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 our returns policy in full.

Poseidon Bathroom Waterproofing – Frequently Asked Questions

1. What is Poseidon?

Poseidon is a liquid-applied waterproofing membrane designed for bathrooms, showers, and wetrooms. It creates a seamless waterproof barrier behind tiles to protect against leaks, mould, and water damage.

2. Where can Poseidon be applied?

Poseidon can be applied to a wide range of surfaces, including plasterboard, cement board, concrete, blockwork, OSB, plywood, and even existing tiles.

3. How do I apply Poseidon?

Simply apply Poseidon with a brush, roller, or spray machine. Two coats are recommended, with the second applied at a 90° angle to the first for complete coverage.

4. Do I need reinforcement tapes or corner joints?

Yes – where there are larger gaps, joints, or movement-prone areas, you should use fleece reinforcement or an acrylic sealant in combination with Poseidon for maximum performance.

5. How can I be sure I’ve applied enough coverage?

Use a wet film gauge during application to check thickness. Poseidon dries to a distinctive blue finish, making coverage visible while ensuring the correct build-up has been achieved.

6. Is Poseidon safe to use indoors?

Yes. Poseidon is a VOC-free, low-odor formulation, making it safe and practical for use in enclosed environments like bathrooms and wetrooms.

7. Does Poseidon meet building standards?

Yes. Poseidon is NHBC compliant and EAD 030352-00-0503 approved, meaning it meets rigorous industry standards for wet area waterproofing.

8. How long will Poseidon last?

When correctly applied, Poseidon provides long-term waterproofing performance, protecting your bathroom or wetroom for 20 years or more.

9. Can Poseidon be tiled over?

Yes. Once fully cured, Poseidon creates a flexible, crack-bridging barrier that is ready for tiling or further finishing.

10. Is Poseidon suitable for both new builds and retrofits?

Absolutely. Poseidon works equally well on new constructions and in retrofit bathroom upgrades, ensuring modern waterproofing performance in any setting.

Related Products