Butyl Putty Tape Window Flange Tape Camper RV Roof and Window Sealant RV Putty Tape (3/16" x 1" x 20') Butyl Putty Tape molds to the shape you need for waterproofing RVs, Trailers, Motohomes, Boats, Etc. Non-hardening with Excellent sealing properties Increases in adhesion with age 3/16 Inch X 1 Inch X 20 Feet Color: Off-White