Fibre-Reinforced Acrylic Waterproofing Bridges fine hairline cracks on parapets, wall and chimney cappings, gutters and roof screws. Convenient membrane-free application - simply brush on quickly and easily. The fibres make it a tough, durable and flexible waterproofer. Non-drip with excellent adhesion. Can be top coated with Duram roof or decorative paints, or used as a final coat. *Fish and plant friendly, so you can use it in your pond. Water-based - application tools are easy to clean with water A premium fibre-reinforced acrylic waterproofer used to bridge fine hairline cracks without the need for a separate reinforcing membrane, on parapets, wall and chimney cappings, gutters and roof screws.