Frost King's Mortite is the original name in Do-It-Yourself fingertip caulking, and it's still famous for its quality and versatility and ease of use. 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 or in woodtone to blend with brown or wood finishes.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.