Thompson’s One Coat Water Seal 1L for Brick Concrete and Stone – Waterproof Sealant for Damp Surfaces

Thompson’s One Coat Water Seal 1L for Brick Concrete and Stone – Waterproof Sealant for Damp Surfaces

Protect your home’s masonry surfaces from water damage with Thompson’s One Coat Water Seal, the trusted solution for fast-acting and long-lasting water resistance. Formulated with an advanced micro-silicone emulsion, this high-performance sealant penetrates deeply to stop water penetration in just one coat.

Unlike traditional sealers, Thompson’s One Coat Water Seal can be applied directly to damp surfaces, making it ideal for unpredictable UK weather. Within just 2 hours, it dries to form a durable barrier against rain, frost, and moisture—preventing costly damage from freeze-thaw cycles and reducing unsightly efflorescence.

Key Features and Benefits

One Coat Coverage
Save time and effort with a single application. No need for multiple coats or waiting between layers.

Apply to Damp Surfaces
Formulated for real-world conditions—no need to wait for full drying before sealing your exterior masonry.

Fast-Drying Formula
Dries in just 2 hours, offering quick turnaround and early weather resistance.

Long-Lasting Waterproof Barrier
Micro silicone emulsion penetrates deep into the surface, creating a strong, invisible barrier that repels water.

Prevents Freeze-Thaw Damage
Protects against water ingress that leads to cracking and surface breakdown during freezing conditions.

Reduces Efflorescence
Helps control the white salt deposits that can form on masonry and spoil its appearance.

Versatile Use
Ideal for external brickwork, stone, concrete and render.

Product Specifications

• Brand: Thompson’s

• Product Name: One Coat Water Seal

• Volume: 1 litre

• Colour: Clear

• Dry Time: 2 hours

• Base: Micro silicone emulsion

• Application Surface: Brick, concrete, stone

• Application Method: Brush or low-pressure spray

• Coverage: Approx. 4–5 m² per litre

• Location: External use

• Recommended Coats: One

• Storage: Store in a cool, dry place