Drybase BBA Tanking Slurry


Drybase BBA Tanking Slurry is a cementitious, ready-mixed surface waterproofer. The waterproofing function is achieved by a unique composition of cement, graded quartz sand and selected additives. It can be used against active and passive water pressures.

  • Above and below ground waterproofing
  • Efflorescence-free
  • Can be spray applied
  • Tested for resistance up to a 6 m head of water
  • Resists water pressure on concrete and masonry surfaces
  • For use both above and below ground
  • CE-marked and BBA-approved
Drybase BBA Tanking Slurry 25KG - Toner Dampproofing Supplies Ltd
Drybase BBA Tanking Slurry 76.44

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Drybase BBA Tanking Slurry

Creating a watertight and waterproof floor is not easy, especially in new buildings and older structures where water is always present. Installation and renovation projects involving basements, car parks, swimming pools and other below-ground structures, may require a high-performance tanking slurry that can stand up to water pressure and the elements.

Drybase BBA Tanking Slurry is a cementitious, pre-bagged BBA-approved surface waterproofer that may be used on both horizontal and vertical surfaces. It is a long-lasting, heat and frost resistant material that is suitable for use in all seasons and conditions. The waterproof formulation has been tested to resist water pressure for up to 7 bar (approx. 70m head).

Waterproofing With Drybase

Drybase BBA Tanking Slurry is a versatile multi-surface waterproofer that may be used on a wide range of surfaces, including but not limited to water retaining structures like swimming pools or reservoirs, below ground structures like basements, car parks, retaining walls & lift pits as well as simple damp-proofing above ground, Drybase Tanking Slurry is an effective multi-surface waterproofer.

No matter the size of the job, Drybase BBA Tanking Slurry prevents water penetration. It’s a well known vapour permeable waterproof barrier that allows for the natural transfer of moisture vapour.

Drybase BBA Tanking Slurry dries efflorescence free, making it ideal for use as a substrate around steel to prevent rebar corrosion.

It is easily applied by brush, trowel or render spray machine for flexibility and ease on the job.

Use On Small Or Big Jobs

Drybase BBA Tanking Slurry specialised formulation has been used in large-scale civil engineering works and commercial contractor basement waterproofing projects all around the UK, Ireland, Europe, America, Canada, Australia and other parts of the world.

Strong Bond

Drybase BBA Tanking Slurry should be applied with a trowel or sprayer in two coats. It may be used on clean, flush-pointed brickwork, rendered walls, and open-pore concrete substrates. Once applied, Drybase Tanking Slurry forms a tough coating for stronger adhesion to Drybase Universal Mortar and other concrete or masonry substrates.

The Drybase Tanking Slurry’s exceptional bonding capability makes it a great choice for both vertical and horizontal surfaces. Drybase can be used to tank foundations, retaining walls, and slabs. Drybase Universal Mortar may be used to repair any damage prior to application, while water leaks may be filled with Drybase Waterproof Plug.

BBA-Certified & Approved

Drybase Tanking Slurry is a certified to British Board of Agrément and has been proven to resist water and sulphates, as well as long-term performance of the structure it is used on. Drybase Tanking Slurry will resist against groundwater and sulfate-rich soil, which can cause significant structural damage.

Waterproofing & Tanking Solution for:

  • Basement and cellar waterproofing and refurbishment
  • Underground car parks
  • Retaining walls
  • Lift pits
  • Tanks, reservoirs and water treatment works
  • Fish ponds and water features
  • Above-ground walls

Additional information

Weight 25 kg
Dimensions 57 × 37 × 17 cm



Does not apply

Part Number




Effective Treatment

Damp Proofing, Waterproofing

Size(s) & Packaging

25 kg PE-lined paper bag


BBA, EN 1504-3:2005/ZA.1a


Grey Powder


Dry conditions at 5 °C to 35 °C.

Shelf Life

12 months


approx. 2.0 kg/l

Working time

approx. 45 min

Setting time

Approx. 5 – 6 h

Compressive strength

approx. 40 MPa

Bending tensile strength

Approx. 6 MPa

Chloride ion content

≤ 0.05 %

Adhesive bond

≥ 2.0 MPa


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