Thompson's Stain Block Damp Seal is high performance and can be applied directly to damp surfaces, permanently covering water, damp and other household stains.
- Transparent seal that prevents expensive water damage
- For use on brickwork, pointing, stone and other cement surfaces
- Prevents moisture penetration whilst allowing the surface to breathe in one coat
- Can be applied to damp surfaces
- Lasts longer than standard waterproofers
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