Sika Proof is a liquid waterproofer that is available in 5 litres or 25 litres depending on what you require. It is suitable for waterproofing water tanks, ponds, swimming pools, and below ground concrete. It can also be used to waterproof renders and screeds. It has an improved resistance to freeze thaw cycles and to unsightly and potentially weakening efflorescence. If you require any assistance or information on this product or any products in our range, contact us using the live chat icon or by emailing us on sales@buildingmaterials.co.uk.