Bostik WATERSTOP Emergency Waterproof Coating

The high-performance Bostik WATERSTOP Emergency Waterproof Coating is specially designed to provide instant leak protection on flat roofs, gutters, and more—even in wet conditions. This versatile coating can be applied directly from the tin without a primer, adhering to a wide range of surfaces such as concrete, stone, wood, metal, zinc, clay, tiles, slate, felt, polystyrene, and most plastics.

Ideal for urgent gutter repairs and roof leaks, this waterproof coating offers a quick-drying, flexible seal that resists cracking, UV damage, and frost, ensuring long-lasting protection. Better for the environment, the formula is free from solvent, bitumen, and isocyanates.

Please Note: Not suitable for polyethylene & polypropylene plastics or bitumen coatings.

Features & Benefits

• Ideal for gutter and roof repairs

• Stops leaks instantly on application

• Can be applied on wet or dry surfaces

• Free from solvent, bitumen, and isocyanates – environmentally friendly

• No primer required for application

• Flexible coating resistant to cracking, UV, and frost

• Suitable for various substrates including concrete, metal, wood, tiles, and most plastics

• Quick drying for fast repairs

• Colour: Grey

• Pack Size: 1kg

Applications

• Emergency leak repairs on flat roofs and gutters

• Sealing cracks and joints on concrete, stone, and masonry

• Waterproofing metal and zinc surfaces

• Coating felt, polystyrene, tiles, and slate surfaces

• Suitable for DIY and professional waterproofing tasks

FAQs

Q1: Can I apply Bostik WATERSTOP on a wet surface?

A: Yes, this coating can be applied directly to both wet and dry surfaces, making it ideal for emergency repairs in rainy conditions.

Q2: Is this coating suitable for all types of plastics?

A: It works on most plastics but is not recommended for polyethylene and polypropylene plastics or existing bitumen coatings.