The highest quality German
damp-proofing products
available in the UK

Heyen Super Structural Water Proofing & Damp ProofingTanking Slurry


Protects against dampness and pressurised ground water. Internal or external use, above or below ground.

Recommended Use:

Our Products can be used in :-

  • Small and Large Domestic housing
  • Basement and Barn Conversions
  • Tanks and Ducts
  • Potable Fresh Water Storage
  • Eco Houses
  • Underground Car Parks
  • Dam Walls
  • Lift Shafts
  • Bathrooms
  • Swimming Pools
  • Koi/Fish Ponds
  • Bund Walls
  • Party Walls

Item Number: HSTS1

Weight: 25kg

  In Stock
Buy 46 or more for £46.17 each

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Heyen Super Tanking Slurry is a cement-based, alkali reactive, plastic modified sealing slurry which achieves a permanent waterproof seal on all sound mineral surfaces against moisture and ground water. It also prevents effluorescence in brickwork.


  • High Water Resistance
  • High Level of Flexibility
  • High Salt Resistance
  • Excellent Adhesion
  • Easy Application
  • Long Life Durability
  • Safe to Apply on Damp Surfaces
  • Over 800,000 bags sold throughout Japan, Russia, Europe, UK.

Additional Products:

Heyen Antisulphate, Heyen Bonding Agent, Heyen Barrier Mortar, Heyen DPM/Vapour Barrier Resin.


All surfaces should have any loose layers removed and be free of bitumen, gypsum, oil, grease, paints etc and be solid and free of any dust. The surface should be pre-wetted thoroughly using HEYEN Bonding Agent at a ratio of 1 part Bonding Agent to 9 parts Water.

Mixing Ratio:

To increase the elasticity, crack bridging properties and bonding strength, it is recommended to add HEYEN Bonding Agent at a ratio of 1 part HEYEN Bonding agent to 2 parts water for above ground applications. For below ground applications use 2 parts HEYEN Bonding Agent to 1 Part Water add HEYEN Super Tanking Slurry and using a plastering paddle, slowly mix until a smooth lump free consistency is achieved.


HEYEN Super Tanking Slurry should be applied to the whole surface in two coats at a thickness of 2mm as a single coat. (Except for above ground applications). The first coat should be applied horizontally and overlapped onto the concrete floor by 150mm. Apply the second coat at right angles to the first as this will ensure complete coverage. The second coat should be applied before the first coat has dried and so that it does not drag. For below ground applications a concaved fillet must be applied to internal angles using HEYEN Barrier Mortar between the two coats of tanking.


HEYEN Super Tanking Slurry should not be applied at temperatures below +5 degrees or on frozen surfaces. HEYEN Super Tanking Slurry once applied should be protected against rain and harsh sunlight. You should also make sure that it does not dry out too fast. In tanking applications ensure there is a through flow of air to prevent condensation build up. The tanking slurry can be plastered 24 hours after, using HEYEN Renovating Plaster.

Where the external ground level is above the internal floor level and to stop penetrating water or moisure and in the loo of a injected DPC, HEYEN Super Tanking Slurry can be applied direct onto the brickwork. In situations where hydrostatic water pressure (Basements and Cellars) and where there are sulphates and nitrates (Salts) it is recommended that HEYEN Anti-Sulphate be applied together with a tight render coat with Heyen Bonding agent in the mixing ratio prior to the application of HEYEN Tanking System. If Hydrostatic water pressure is experienced use HEYEN Waterstop as a dried powder or mix with water to form a plug.

Tools and Coverage Rate:

Brush, Trowel or Specialist Spray Equipment

Approximately 12 sq metre from a 25kg bag   (Depending on the substrate)

2kg/sq metre for above ground applications

4kg/sq metre for below ground applications




Heyen Super Slurry

Heyen Bonding Agent

Gauging Liquid Ratio

Heyen Anti-Sulphate

Heyen Barrier Mortar

Above Ground Level

Single Coat 1.5 to 2.0kg Super Slurry Grey 2.5kg Bonding Agent per bag 1 Part Bonding Agent to 2 Parts Water Available in 10kg Not Required
At or around Ground Level Single Coat 2.0kg Super Slurry Grey 2.5 kg Bonding Agent per Bag 1 Part Bonding Agent to 2 Parts Water Average Available in

Below Ground Externally Positive Pressure

Single Coat 2.0kg Super Slurry Grey 5kg Bonding Agent per Bag 2 Parts Bonding Agent to 1 Part Water 45m2 25kg
Below Ground Internally (Negative Pressure) Two Coats 2.0kg Super Slurry Grey and 2.0kg Super Slurry White 5kg Bonding Agent 2 Parts Bonding Agent to 1 Part Water For 2 Coats

1kg per Linear Metre


Sizes: 25kg bag.

Heyen Super Tanking Slurry TDS

Heyen Super Tanking Slurry SDS

For more information andf technical assistance, please call 07801 927519