Flash Seal is a versatile and easy-to-use product specially made to repair flashing (the sheet metal or other material that covers and protects the joint at which a roof intersects a chimney). Once applied, the Flash Seal fluid dries to become a flexible, waterproof membrane. It’s formulated for permanent adhesion to asphalt shingles, metal flashings, brick, and other chimney and roofing materials. Use Flash Seal to solve problematic leaks around the base of chimneys, stacks, and vents. We also recommend using it for sealing around skylights.
With Flash Seal, it’s easy to repair a flashing that has been tarred over, split, or cracked. Have a Midtown Chimney Sweeps technician apply what is basically a custom-fit rubber boot at the base of your chimney! It will be permanently flexible and has a 7-year warranty when used with Flash Seal Reinforcement Fabric.