WATERSTOP Emergency
Waterproof coating for roofs and gutters to stop leaks instantly
Grey
Features & benefits
Bostik WATERSTOP Emergency Waterproof Roof Coating is a high-performance, brushable coating for leaky roofs and gutters that stop leaks instantly, even when applied in the rain.
With no primer required, this grey emergency roof seal can be applied straight from the tin to wet and dry surfaces, including sound, clean concrete, stone, wood, metal, zinc, clay, tiles, slate, felt, polystyrene, and most plastics.
Quick and easy to apply, this roof repair paint only requires a disposable brush to achieve an effective waterproof coating. Free from solvent, bitumen, and isocyanates, Bostik WATERSTOP Emergency Waterproof Coating ensures immediate, long-lasting protection and a seal that resists cracking, UV, frost, and temperature variations.
High-performance roof seal that stops leaks instantly
Instant waterproof roof sealer - can be applied to wet and dry surfaces
No priming required, apply directly to substrates including concrete, stone, wood, metal, zinc, clay, tiles, slate, felt, polystyrene and most plastics
Paint on waterproofer - apply straight from the tin with a disposable brush
Solvent, bitumen, and isocyanates-free formula
Long-lasting protection and resistance to cracking, UV, frost, and temperature variations
Technical information
bostik-diy-uk-protect-waterstop-emergency-TDS02222.pdf (249.24 KB)
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How to use
PREPARATION
- Clear away leaves, moss, dirt, rust or debris. Degrease and clean away any contaminants to ensure the surface is sound.
- The coating can even be applied when the leaky roof or gutter is damp, but we recommend brushing away excess water - surface should not be puddled.
APPLICATION
- Open the tin, pierce the film and apply immediately to the affected area using a disposable brush - the product starts curing once exposed.
- Apply a continuous, even layer over the damaged or leaking area, making sure to cover cracks, seams or joints thoroughly.
- Allow the first coat to dry (approx. 4 hours at 20 °C) before applying the second coat - it should be dry to touch.
- Full cure typically takes 24 hours under normal conditions.
- After curing, test the repair with water via a hose or rainfall, to ensure leaks are completely sealed. Check that the coating is continuous, without gaps or thin spots. Reapply a layer of the roof repair paint if the leak persists.
Good to know: For cracks wider than 5 mm, fill them fully. For corners, joints or areas that move, embed reinforcing scrim into the first wet coat.
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