Forms a flexible seal inside or outside. Requires no tools. Easy to apply.

A high-quality caulking compound which will not harden, crack, chip or peel and can be used either indoors or outdoors. It may also be painted.

Forms a flexible seal inside or outside. Requires no tools. Easy to apply.

Mortite 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 or in woodtone to blend with brown or wood finishes.