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Everbuild Aquaseal Waterproof Tanking Membrane 5L – Bulk Buy


Everbuild Aquaseal Waterproof Tanking Membrane

A ready-to-use liquid waterproofing compound

Everbuild Aquaseal Waterproof Tanking Membrane is a ready-to-use liquid waterproofing compound that is applied as a 2-coat system by brush. It provides a permanently flexible watertight membrane on floors and walls prior to tiling in shower areas, wet rooms and wet zones, and other areas subject to water exposure such as balconies and partially covered external areas. Non-hazardous and solvent free, it is quick drying, and tiling can commence after 12 hours. It can be used on its own in many applications where a flexible watertight membrane is required, or in conjunction with Aquaseal Tanking Primer, Aquaseal Tanking Tape and Aquaseal Tanking Drain Mat, as part of the Aquaseal Wet Room System, to provide a 100% waterproof membrane to conventional plaster and timber-based boards. It can be applied to all common building substrates such as plasterboard, MDF, plywood cementitious boards, blockwork, concrete & speciality wet room boards.

  • Permanently flexible and watertight
  • Can be used on most common building surfaces
  • Ready to use, no diluting necessary
  • Easy to apply by brush.
  • Non-hazardous, solvent free
  • Can be tiled over after 12 hours


  • For showers, wet rooms and wet zones in bathrooms
  • As a tanking membrane as part of the Everbuild Aquaseal Wet Room System
  • As a waterproof membrane on most common building surfaces
  • Balconies and partially covered external areas
* Box of products need to have a pallet, 1/2 or 3/4 of any Sika / Everbuild / Feb in your order to checkout. (it's how we do free delivery)

£32.99 +VAT

£32.99 +VAT

Everbuild Aquaseal Waterproof Tanking Membrane further information

Coverage: 4-7.5 m2 per 5L depending on porosity of substrate



All surfaces must be clean, sound and dust-free.


Prime porous and semi porous substrates with Everbuild Aquaseal Tanking Primer (where this is not available use a suitable SBR Bonding Agent, such as Everbuild 503 SBR Bond, diluted with 4 parts water) and allow to dry for one hour before applying the membrane. Apply by brush (at least 75mm / 3″ wide) in two coats which should be applied in different directions at right angles to each other to ensure full surface coverage is achieved with no weak spots. Apply the first coat horizontally and allow to dry for a minimum of 6 hours.

Then apply the second coat vertically. Pay careful attention to edges and corners to ensure that the coverage in these areas is always consistent as these are the potential weak spots where leakage could occur. We always recommend the use of Aquaseal® Tanking Tape on corners and board joints prior to applying the membrane to ensure the integrity of the watertight seal.

Aquaseal® Tanking Tape provides cross-directional movement at corners and on board joints and is available in 10 metre rolls. The Aquaseal® Tanking Drain Mat is also recommended around the drain outlet, which is the area most susceptible to leaks. As a guide the finished two-coat system, when dry, should have a minimum thickness of 1mm. Allow the second coat to dry thoroughly for up to 12 hours before tiling.

Everbuild Aquaseal Waterproof Tanking Membrane characteristics

Specific Gravityca. 1.35 g/cm3
Solids Content65-70%
Drying TimeMinimum 6 hours depending on ambient temperature.
Coverage4-7.5 m2 per 5L depending on porosity of substrate.

Everbuild Aquaseal Waterproof Tanking Membrane product information

Packaging5L pail
Appearance / ColourBlue paste
Shelf Life24 months from the date of manufacture when stored according to manufacturers instructions.
Storage ConditionsStore in cool, dry conditions between +5°C and +25°C. Storage outside these parameters will dramatically reduce shelf life. Protect from frost.


Ambient Air Temperature: 10oC to 35oC


  • Do not apply below 10°C.
  • Do not apply externally when rain is imminent (with-in 6 hours).
  • Do not apply second coat until the first is dry.
  • Damp or humid conditions will significantly extend drying time.
  • It is the user’s responsibility to determine suitability for use. If in doubt contact Technical Services for advice.

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