Everbuild
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$80.99
Thompsons Water Seal 5L | Clear Silicone Waterproofer & Masonry Sealer | Protects Decking, Brick, Concrete, Stone & Paving | Stops Freeze-Thaw Damage | Damp Surface Formula | Fast Drying
★★★★★
$80.99
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About this item
- INVISIBLE CLEAR WATERPROOF SEAL THAT WON'T YELLOW OR PEEL — Thompsons Water Seal dries completely clear, preserving the natural colour, texture and appearance of every surface it protects. Unlike film-forming sealants that sit on the surface and eventually peel or yellow, this silicone formula penetrates deep into the material to create an invisible internal barrier that repels water at the source — without changing how the surface looks.
- STOPS FREEZE-THAW DAMAGE — ESSENTIAL PROTECTION FOR UK SURFACES — the most destructive force on outdoor masonry and wood in the UK is not rain itself but freeze-thaw damage — water penetrates a surface, freezes, expands and cracks the material from within. Thompsons Water Seal blocks water absorption before it starts, preventing this cycle entirely. Essential autumn treatment for patios, driveways, brick walls, concrete steps and garden structures before the first frost.
- APPLY DIRECTLY TO DAMP SURFACES — NO WAITING FOR SURFACES TO DRY — most waterproof sealers require surfaces to be completely dry before application — often forcing a wait of several days after rain. Thompsons Water Seal is specifically formulated for direct application to damp surfaces, meaning you can treat your patio, decking or brickwork as soon as the rain stops and move on with your project the same day. Touch dry in approximately 2 hours.
- MULTI-SURFACE FORMULA — WORKS ON WOOD, MASONRY AND STONE — use on decking, fences and wooden structures; patios, driveways, paths and paving; brick walls, render and blockwork; concrete, stone, sandstone and slate. One product covers every exterior surface around your home — eliminating the need to buy separate sealers for different materials. Confirm coverage rate from your product label before purchasing (typically 3–5m² per litre on porous surfaces).
- EASY TO APPLY — BRUSH, ROLLER OR GARDEN SPRAYER — apply generously to a clean or damp surface using a brush, roller or low-pressure garden sprayer. Work in sections to maintain a wet edge and avoid lap marks. One coat is sufficient on most surfaces — apply a second coat on highly porous materials such as old brick or sandstone. Available in 1L - 5L Litre for smaller & Large areas and targeted treatments, and 5 Litre for larger surfaces and full driveway or patio coverage.
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What customers say about Bigamart
10 Trustpilot reviews total, with 2 shown at a time.
Trustpilot
★★★★★
Excellent
4.5 average rating
S
Sigalit
🇮🇱 · January 2026
★★★★★
I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.
V
Verified buyer
🇦🇺 · November 2025
★★★★★
The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.
Showing 1–2 of 10 reviews
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