Stop leaks in their tracks with 151 Roof & Gutter Sealant, the fast and easy solution for a watertight seal on all exterior surfaces. This black, acrylic sealant creates a permanent barrier to protect your roof and gutters from leaks and moisture damage, even in extreme weather conditions. 151 Roof & Gutter Sealant comes in a convenient DIY cartridge that fits standard caulking guns for mess-free application. Simply ensure the surface is clean and dry before applying for a long-lasting, waterproof fix.