Damp & Waterproofing
Damp-proof paints, waterproof sealers, mould treatments and moisture solutions for walls, roofs and basements. Treat the cause of the damp first, then seal and protect the surface.
Filters
159 products
Polycell Mould Killer Spray, 500ml
£7.99 inc. VAT
RRP £12.44 Save 35%£6.66 ex. VAT£15.98 per litre
Polycell One Coat Stain Stop 1L
£19.99 inc. VAT
RRP £32.16 Save 37%£16.66 ex. VAT£19.99 per litre
Polycell One Coat Damp Seal - 1L
£19.99 inc. VAT
RRP £33.06 Save 39%£16.66 ex. VAT£19.99 per litre
Rustins One Coat Damp Seal 250ml
£6.99 inc. VAT
RRP £9.56 Save 26%£5.83 ex. VAT£27.96 per litre
Thompson's
Thompsons Drive Seal 5 Litre
£29.99 inc. VAT
RRP £35.37 Save 15%£24.99 ex. VAT£6.00 per litre
Thompson's
Thompson's Stain Block Damp Seal - 2.5L
£56.99 inc. VAT
RRP £68.08 Save 16%£47.49 ex. VAT£22.80 per litre
Thompson's
Thompson's Water Seal, 1L
£11.99 inc. VAT
RRP £14.51 Save 17%£9.99 ex. VAT£11.99 per litre
Thompson's
Thompson's Emergency Leak Fix 310ml
£12.99 inc. VAT
RRP £15.12 Save 14%£10.83 ex. VAT£41.90 per litre
Thompson's
Thompson's Emergency Roof Seal 1L
£30.99 inc. VAT
RRP £36.62 Save 15%£25.83 ex. VAT£30.99 per litre
Thompson's
Thompson's Stain Block Damp Seal 250ml
£9.99 inc. VAT
RRP £11.63 Save 14%£8.33 ex. VAT£39.96 per litre
Thompson's
Thompson's Stain Block Damp Seal 750ml
£20.99 inc. VAT
RRP £24.66 Save 14%£17.49 ex. VAT£27.99 per litre
Thompson's
Thompson's Emergency Roof Repair Mastic - 750ml
£18.99 inc. VAT
RRP £22.99 Save 17%£15.83 ex. VAT£25.32 per litre
Thompson's
Thompson's Emergency Instant Repair Aerosol, 450g
£17.99 inc. VAT
RRP £21.41 Save 15%£14.99 ex. VAT£39.98 per kg
Thompson's
Thompson's Water Seal 5L
£26.99 inc. VAT
RRP £32.75 Save 17%£22.49 ex. VAT£5.40 per litre
Thompson's
Thompson's One Coat Water Seal, 5L
£30.99 inc. VAT
RRP £37.62 Save 17%£25.83 ex. VAT£6.20 per litre
Cuprinol Garden Furniture Cleaner 500ml
£5.99 inc. VAT
RRP £9.77 Save 38%£4.99 ex. VAT£11.98 per litre
Thompson's
Thompson's Emergency Roof Seal 2.5L - Black
£51.99 inc. VAT
RRP £62.09 Save 16%£43.33 ex. VAT£20.80 per litre
Polycell Stain Stop Aerosol 250ml
£10.99 inc. VAT
RRP £17.11 Save 35%£9.16 ex. VAT
Thompson's
Thompson's Patio and Block Paving Seal Natural 5L
£53.99 inc. VAT
RRP £65.06 Save 17%£44.99 ex. VAT£10.80 per litre
Nitromors
Nitromors Rust Convertor
£24.99 inc. VAT
RRP £37.06 Save 32%£20.83 ex. VAT
Bedec Stain Block 750ml
£23.99 inc. VAT
RRP £35.62 Save 32%£19.99 ex. VAT£31.99 per litre
Ronseal Garden Cleaner 5L
£10.99 inc. VAT
RRP £13.00 Save 15%£9.16 ex. VAT£2.20 per litre
Thompson's
Thompson's 10 Year Roof Seal 4L Black
£50.99 inc. VAT
RRP £61.92 Save 17%£42.49 ex. VAT£12.75 per litre
Thompson's
Thompson's 10 Year Roof Seal, 2.5L, Black
£34.99 inc. VAT
RRP £42.25 Save 17%£29.16 ex. VAT£14.00 per litre
Thompson's
Thompson's 10 Year Roof Seal 4L Grey
£50.99 inc. VAT
RRP £61.92 Save 17%£42.49 ex. VAT£12.75 per litre
Thompson's
Thompsons 10 Year Roof Seal Grey 1 Litre
£18.99 inc. VAT
RRP £22.27 Save 14%£15.83 ex. VAT£18.99 per litre
Thompson's
Thompson's 10 Year Roof Seal 2.5L, Grey
£34.99 inc. VAT
RRP £42.25 Save 17%£29.16 ex. VAT£14.00 per litre
Thompson's
Thompson's 10 Year Roof Seal 1L Black
£18.99 inc. VAT
RRP £22.27 Save 14%£15.83 ex. VAT£18.99 per litre
Ronseal One Coat Damp Seal White 750ml
£20.99 inc. VAT
RRP £24.59 Save 14%£17.49 ex. VAT£27.99 per litre
Ronseal One Coat Damp Seal White 250ml
£9.99 inc. VAT
RRP £11.61 Save 13%£8.33 ex. VAT£39.96 per litre
Ronseal One Coat Damp Seal White 2.5L
£41.99 inc. VAT
RRP £50.82 Save 17%£34.99 ex. VAT£16.80 per litre
Gorilla Waterproof Coat and Seal Black 946ml
£34.99 inc. VAT
RRP £39.99 Save 12%£29.16 ex. VAT£36.99 per litre
Nitromors
Nitromors Non-Hazardous Rust Remover
£18.99 inc. VAT
RRP £26.90 Save 29%£15.83 ex. VAT
Gorilla Waterproofing Stand Display
£767.99 inc. VAT
RRP £904.11 Save 15%£639.99 ex. VAT
Nitromors
Nitromors Rust Remover Jelly
£16.99 inc. VAT
RRP £24.69 Save 31%£14.16 ex. VAT
Coo-Var
Coo-Var Anti-Condensation Paint, 500ml
£11.99 inc. VAT
RRP £17.84 Save 32%£9.99 ex. VAT£23.98 per litre
Coo-Var
Coo-Var Anti-Condensation Paint 1L
£21.99 inc. VAT
RRP £32.14 Save 31%£18.33 ex. VAT£21.99 per litre
Rustins UPVC Cleaner 500ml
£6.99 inc. VAT
RRP £9.56 Save 26%£5.83 ex. VAT£13.98 per litre
Wykamol
Wykamol Technoseal Damp Proofing Paint
£48.99 inc. VAT
RRP £72.83 Save 32%£40.83 ex. VAT
Zinsser Peel Stop Binding Primer 2.5L
£30.99 inc. VAT
RRP £48.36 Save 35%£25.83 ex. VAT£12.40 per litre
Bostik Flexacryl Instant Repair Waterproofer, 5kg Black
£107.99 inc. VAT
RRP £160.82 Save 32%£89.99 ex. VAT£21.60 per kg
Bostik Flexacryl Instant Roof Repair Compound Grey 5kg
£105.99 inc. VAT
RRP £157.79 Save 32%£88.33 ex. VAT£21.20 per kg
Rustins Quick Drying MDF Clear Sealer 1L
£12.99 inc. VAT
RRP £19.12 Save 32%£10.83 ex. VAT£12.99 per litre
Gorilla Waterproof Coat and Seal Spray, 450ml Black
£18.99 inc. VAT
RRP £21.99 Save 13%£15.83 ex. VAT£42.20 per litre
Bostik Flexacryl Waterproofer Solvent Free 5L Grey
£109.99 inc. VAT
RRP £164.08 Save 32%£91.66 ex. VAT£22.00 per litre
Bostik Bituminous Black Paint 5L
£31.99 inc. VAT
RRP £47.33 Save 32%£26.66 ex. VAT£6.40 per litre
Bostik Brushable Waterproofer for Roofs 2.5L
£19.99 inc. VAT
RRP £29.74 Save 32%£16.66 ex. VAT£8.00 per litre
Bostik Brushable Roof Waterproofer 5L
£30.99 inc. VAT
RRP £45.62 Save 32%£25.83 ex. VAT
How to choose damp and waterproofing products
Find the cause of the damp first, then choose the treatment.
| Product | Best for | Things to know |
|---|---|---|
| Mould and mildew remover | Black spots on walls, sealant and grout | Ventilate the room and wear gloves |
| Anti-mould paint | Bathrooms, kitchens and cold walls | Treat existing mould before painting |
| Damp-proof paint | Sealing patches of damp on walls | Does not fix the cause of the damp |
| Masonry waterproofer | Brick and render letting in rain | Usually clear; check it is breathable |
| Roof and gutter sealant | Small leaks in flashing and gutters | Work only from safe, stable access |
Damp & Waterproofing: frequently asked questions
How do I tell condensation from rising damp?
Condensation usually shows as mould on cold walls, window reveals and corners, often worse in winter. Rising damp tends to leave a tide mark low on ground-floor walls. If unsure, get a qualified damp surveyor to inspect.
Will anti-mould paint stop mould coming back?
It helps resist regrowth, but mould returns if the room stays damp. Kill existing mould first, then improve ventilation and heating to reduce condensation.
Can I paint over damp walls?
Not until the wall is dry and the cause is fixed. Paint over a wet wall usually blisters or flakes, and the damp may spread elsewhere.
Does masonry waterproofer let walls breathe?
Many are designed to be breathable, so moisture can escape while rain is repelled. Check the product label, as a non-breathable coating can trap moisture in brickwork.
Buying in bulk or for your business?
Landlords, trades and facilities teams can ask us for a quote on larger quantities.