BBA Approved tanking mix for waterproofing basement walls

Price incl. VAT
(164 items in stock)

Hydra-Dry is a BBA Approved tanking mix formulated for waterproofing basement and cellar walls. The tanking powder  comprises a polymer modified cement formulation that mixes with water to make a tanking slurry for waterproofing cellar walls.

This paint on tanking slurry system prevents ingress of water and works by forming a physical and chemical bond with the substrate. It provides a monolithic waterproof layer yet still allows some vapour transmission thereby reducing the risk of condensation

  • Waterproofs cellars and basements.
  • Suitable for brick, stone, block and concrete.
  • Resists hydrostatic pressure up to 5 metres head.
  • Can be applied to saturated surfaces.
  • Easy brush application.
  • Suitable for use in contact with potable Water.
  • Approved by the British Board of Agrément.

Hydra-Dry tanking powder is provided in a 25kg bag. Mixed with 6.5 litres of water and used at the rate of 3kg of mixed slurry per sq/m, there is sufficient Tanking Slurry to cover up to 12 sq/m of wall with 1 coat of slurry 1.5mm thick orup to 6 sq/m with the recommended 2 coat application

There are no reviews yet.

Write a review

    Overall satisfaction
    Value for money
    Ease of use

Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alternatively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

It is important that the customer ensures that all the delivery details are correct and that the customer or someone acting for the customer is able to sign for the delivery. Twistfix accept no liability for failed deliveries as a result of incorrect delivery details or the absence of any authorised signatory. Twistfix will attempt delivery to the recipient between the hours of between 8am and 6pm. If no one is available to receive the delivery an attempt may be made to leave the item with a neighbour. Alternatively the carrier may return the item to the sorting office and leave a calling card at the recipient's address to advise of the attempted delivery. It is the responsibility of the customer to arrange to collect the item from the depot or to arrange re-delivery with the carrier. Further information regarding Delivery can be read at our Terms & Conditions.


Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.