Mortite is the original name in Do-It-Yourself caulk, and is still famous for its quality and versatility. Sure, Mortite Weather-strip and bead caulk will seal the windows effectively. But it is also widely used as a gasket material, sound deadening insect barrier, crack filler, and all-around plug-top. 19 oz. 90 ft. Color: Woodtone For use on wood, plastic, metal, masonry, glass and concrete. waterproof forms. Waterproof seal on porous and non-porous surfaces. No caulk gun needed, just press into place with fingertips Doesnt harden so seals tight, but can be easily removed. - 1