Aquaproof Wetroom Tanking System


  • For use in wet rooms, shower areas, bathrooms and WCs.
  • For use in areas of frequent wetting.
  • Waterproofing below tiles and vinyl in wet areas.
  • Waterproofing of internal areas in risk of flooding such as kitchens.
  • Waterproofing prefabricated bathroom pods.
  • Waterproofing to changing rooms, saunas and steam rooms.


The Aquaproof System has been developed to prevent water leakage from tiled areas, including wetrooms, shower areas, bathrooms and kitchens. It is compatible with a wide range of substrates, including ply sheeting, shower tray formers, plasterboard, MDF, cementitious screed and most commonly available waterproof construction boards. Once applied, the Aquaproof System can tolerate normal levels of movement in a room, and does not become brittle with age. It is technically-advanced and comes with a 10-year manufacturer’s warranty; it is independently-certified as meeting the requirements of ETAG 22 'watertight covering kits for wetroom floors and walls' and holds its own European Technical Approval certificate. By specifying Aquaproof, a fully-tanked room can be achieved, preventing damage to walls/ floors, and leakage into adjacent rooms.

Feature and benefits:

  • Fully waterproof.
  • Breathable (water-vapour permeable).
  • Flexible.
  • Silicone-compatible.
  • Compatible with underfloor heating.
  • User-friendly (virtually odour free).
  • Non-solvent containing.
  • Simple to apply.
  • Cold liquid-applied.
  • Easy to tile over with standard waterproof tile adhesives.
  • Crack-bridging coating.
  • Tested against ETAG 22 (part 1), 'Liquid applied watertight covering for wet rooms with wearing surface.'

General information



A smooth light grey brushed or rolled coating.




Available as a kit or as individual components.

Waterproof compound

  • Aquaproof Compound: Crack bridging liquid coating.

Solvent-free primer

  • Aquaproof Primer – Low viscous solvent free primer.

Elastic tape

  • Aquaproof Tape – Fabric reinforced elastic sealing tape for sealing wall / floor junctions and other areas subject to stress.

Fabric-reinforced elastic

  • Aquaproof Small Sleeves – Small square fabric reinforced elastic sealing sleeves for detailing of small bore pipe penetrations.
  • Aquaproof Outlet Sleeves – Large square fabric reinforced elastic sealing sleeves for detailing of waste outlets of around large pipe penetrations.
  • Aquaproof Pre-Formed Corners – Pre-made internal or external corners made from fabric reinforced elastic sealing tape.

Butyl membrane

  •  Aquaproof Butyl Tanking Strip – A self-adhesive butyl membrane specifically designed for sealing into linear waste channels.


Available as a kit or as individual components.

10 m²

Aquaproof Traditional Shower Kit and Aquaproof Linear Shower Kit.

9 kg

Aquaproof Compound.

2 kg

Aquaproof Primer.

0.12 x 15 m

Aquaproof Tape.

0.12 x 50 m

Aquaproof Tape.

Show more


Ten years

All materials mentioned are covered by the Koster 10-year product warranty.

Uniclass 2015

Ss_32_20_95_15 Cold-applied liquid internal wall damp-proofing systemsPrimary


J30/10 Cold applied damp proofing

J30/130 Cold applied damp proofing . . . . . .

Product range

Wetroom Waterproofing System

Specification data - Cold-applied liquid internal wall damp-proofing systems Enhanced data

System performance

Conforms to BS 5385-4: 2015.





Can be applied to a clean and stable substrate. Including:

•                   Plasterboard

•                   Plywood

•                   Cementitious screeds

•                   Brick and block work

•                   Plastic – no primer required

•                   Waterproof construction boards


Aquaproof Primer.

Damp proof coatings


Coating materials

Robust and elastic rubber membrane.

Waterproofing Coating – Aquaproof Compound.


Aquaproof Tape.

System completion

Carefully check over installed and cured membrane to ensure there are no pinholes, un-applied areas or tears.

Aquaproof Pre-formed Corners

Not required.


For the formation of extra secure internal and external corners.


Pipe penetrations:

Aquaproof small sleeves.

Aquaproof outlet sleeves.

Aquaproof butyl tanking strip.

Environmental information

Country of product manufacture



Aquatecnic Aquaproof Tanking System

Aquatecnic Aquaproof Tanking System

Koster Waterproofing Systems: The Green Pages of Waterproofing and Construction Chemicals

Koster Waterproofing Systems: The Green Pages of Waterproofing and Construction Chemicals

Third party certifications

  • ETA ETA-09/0200 according to "ETAG 22 : Watertight covering kits for wetroom floors and /or walls

Similar products from Koster Aquatecnic Ltd

Mineral Based Waterproofing System

Mineral Based Waterproofing System