Thompson’s TWSEAL25L Water Seal utilises hydrophobic technology to deliver invisible protection against water damage.
The deep penetrating formulation travels deep into exterior dry porous surfaces to form a breathable membrane that allows moisture vapour inside the substrate to evaporate whilst protecting against water penetration and damage.
Thompson’s Water Seal has a unique formulation which, unlike some waterproofers, penetrates the surface therefore waterproofing even after the initial beading is gone. It will not be destroyed by ultraviolet light and is long lasting even under heavy moisture conditions.
Assuming application instructions and coverage guidelines are adhered to it provides effective water repellency for years.
Suitable for use on brick, concrete and stone. For exterior use only.
More Information
TypeSealant
BrandThompsons
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We deliver local and nationwide any day except Saturdays, Sundays and Bank Holidays.

We will contact you via text the evening before with a 90-minute timeslot for your delivery, so you can plan your day.

If your order is within our designated area, then we will deliver it for FREE NEXT DAY (subject to availability and minimum order value).

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Returns and Refunds Policy

In the unlikely event that a delivered product is faulty or damaged, we will exchange it or provide you with a full refund, as long as we are notified of the product’s fault within 48 hours of it being delivered to you.


Champion Timber shall not accept on return for credit any goods ordered from Champion Timber incorrectly or subsequently found to be surplus to the customer’s requirements. The suitability of specialist goods is assumed to have been assessed by the customer or his/her advisor(s) prior to purchase. Champion Timber shall endeavour to assist customers where possible by accepting at a reasonable restocking charge the return of goods (together with the original packing if applicable) which are from Champion Timber normal stock lines but goods ordered from the manufacturer cannot be accepted without Champion Timber prior agreement for the return and Champion Timber restocking charges having been paid. In any event, credit cannot be given unless the customer provides Champion Timber with the number of the invoice on which the goods were supplied.

View our full Returns and Refunds Policy.