Mortite Gray Weatherstrip & Caulking Cord, 45 Ft.

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.