CRC Leak Stop Spray Seal is easy to use and provides a waterproof seal to almost any surface. Bridging gaps and cracks, it offers a flexible, durable, long lasting solution to leaks. The 360Â° spray system allows the can to be used at any angle, ideal for hard to reach places. Once fully cured CRC Leak Stop Spray Seal will be translucent. The longevity of this seal can be improved by coating with any paint finish. For use on: Gutters, skylights, chimney connections, ventilation pipes, ducts, sheet-metal covers, bitumen, vents, flashings, monolithic and plastered surfaces, downpipes, awnings, and general waterproofing.