Paintable autobody Seam Sealer leaves a factory-like finish that won't harden or sag. After stripping a car or repairing a panel, replace the seam sealer to protect your hard work from the elements. Seals Cracks, Crevices And Body Seams, Plus Waterproofs And Insulates Stays Flexible And It Won'T Crack Waterproofs And Insulates For Firewalls, Floor Pans, Trunk Seams, Fender Extensions, Taillight Openings Applies Easily With Your Standard Caulking Gun