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Use for:

  • Providing a complete and easy to use waterproofing system for the protection of substrates (when used powder mixed with liquid) prior to fixing wall and floor tiles in dry or wet interior and exterior environments. NOTE: Corners/edges must be reinforced with BAL TANK IT TAPE. 
  • Suitable for areas of total immersion such as swimming pools. 
  • Suitable for areas where/limited movement may occur (e.g. around drainage channels, junctions between walls/floors), and for preventing water penetration through suspended floors.

The system will fully seal walls and floors and is suitable in association with an approved design for:

  • Heavy Duty Showers and Power Showers.
  • Wet Rooms.
  • Swimming Pools.
  • Hydrotherapy Pools.
  • Spa Pools.
  • Fountains.
  • Water Features.
  • Terraces.
  • Balconies.

Suitable surfaces:

  • Concrete; cement: sand screeds and rendering.
  • BAL QUICKSET CEMENT: sand screeds and rendering.
  • Dense concrete/blockwork walling.
  • Lightweight blockwork/walling.
  • Glazed/Unglazed ceramic tiles, quarry tiles, terrazzo and natural stone.
  • Fibre reinforced cement boards and lightweight tile backer boards.
  • Undertile electrical heating systems.
  • Heated screeds.
  • Overlaid timber floors (min. 15 mm) – Internal.
  • Tongued and grooved floorboards with BAL RAPID - MAT/BAL FLEXBONE Varied - Internal only.
  • Plaster (finish coat only) – Internal only.
  • Plasterboard - Internal only.

See manufacturer's literature for further information.


Rapid-setting, rapid-drying, two-part, highly polymer-modified, waterproof cementitious based system for walls and floors. Tile after 90 minutes.

Features and benefits:

  •  Simple, easy to apply two-part mix.
  •  Total waterproof protection.
  •  Ideal for power showers, wet rooms, total immersion areas or external areas.
  •  Rapid setting; allows tiling in 90 minutes.
  • Weight allowance for tiling dependent on weight tolerance of background/substrate.

Not suitable for use as a damp proof membrane or as a wearing surface. BAL TANK-IT should not be exposed/ submerged to water without a suitable covering such as tiles.

General information




Polymer-modified cement



Warranty description

25 year


Ss_32_80_03_16 Cold-applied liquid sandwiched tanking systemsPrimary
Pr_20_31_53_14 Cementitious tanking mortars


J30/130 Cold-applied damp-proofing

J30/10 Cold-applied damp-proofing

J30/110 Cold-applied tanking

J20/110 Tanking

Specification data - Cold-applied liquid sandwiched tanking systems




Guidance for specification option:

Consult manufacturer and insert requirements.

  • Ensure surfaces to be tiled are flat, clean, dry, sound and free from contamination.
  • Surface regularity is required to SR1 or better. Surface Regularity is defined as the deviation in height of the surface of a flooring layer over short distances in a local area. In simpler terms, it is the ‘flatness’ or ‘measure of unevenness’ of the surface.

Pointing and filling mortar

Cement-gauged mortars.


Guidance for specification option:

Consult manufacturer and insert requirements or omit.




Rapid setting cement-based powder with liquid polymer.



Guidance for specification option:

Corners/edges must be reinforced with BAL TANK-IT TAPE.

Pack size

5 kg powder, 5 Ltr liquid.

Setting time

90 minutes at 20°C.

Pot life

45 minutes at 20°C.


To BS EN ISO 9001, ISO 14001, BS EN 13813, BS EN 14891:2012.

Bed height

0.5 mm per coat (1 mm max).


0.73 m²/kg (per 1 mm thickness).