Tanking Slurry

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Tanking slurry

Tanking Slurry is the name given to the material that creates a barrier to water leakage in basements, cellars and other underground spaces. If you have heard anyone talk about “cementitious tanking” then they are referring to application of slurry - both terms refer to the same thing.


An application of tanking slurry can make all the difference when it comes to turning a damp unusable basement or cellar into a functional room.

How tanking slurry works

Tanking slurry is mixture of cements, aggregates and chemicals that combine to block water ingress through walls. The chemicals and aggregates in Tanking slurry improve the strength, bonding and abrasion resistance making it waterproof in a way that ordinary cement is not.


Tanking slurry will usually come in powder form and require mixing. It usually requires a minimum of two coats to be effective. Before applying additional coats, the tanking slurry should be dry to the touch.


When applying tanking slurry it is particularly recommended to pay close attention to the wall floor joint, as this is an area that is particularly vulnerable to water ingress.

Tanking slurry and waterproofing regulations

For a tanking slurry to be classified as “waterproof” it must satisfy certain conditions set out by the British Standards Institute (BSI). BS 1881, part 122 specifically deals with tanking slurrys and Peter Cox rigorously follow these waterproofing regulations as part of our commitment to best practice within our industry. So you can be sure that any tanking product we use on your basement or cellar is of a high quality and meets the required criteria.

Peter Cox: Waterproofing professionals

Peter Cox surveyors are trained to CSSW (Certified Surveyor of Structural Waterproofing) standards as dictated by the Property Care Association (PCA). Our methods are also endorses by trade bodies such as Which?, Safe Contractor, Trust Mark and more.

Also, all of our tankingwork comes with a 10-year guarantee for complete peace of mind.

If you want a professional application of tanking slurry to your cellar or basement there are few choices out there equal to Peter Cox.

If you want to talk to a waterproofing professional about tanking in your property, or any other alternative waterproofing options, then give our experts a call today on 0800 633 5712 or use our contact form below.

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