Mortite Weatherstrip and Caulking Cord

Mortite from Frost King, is the original name in Do-It-Yourself caulking, and it's still famous for its quality and versatility. Sure, Mortite Weatherstrip and Caulking Cord will seal windows effectively. But it's also widely used as a gasketing material, sound deadener, insect barrier, crack filler, and all around "plugger-upper." It's available in classic grey.