Butyl Putty Tape Window Flange Tape Camper RV Roof and Window Sealant RV Putty Tape (1/8" x 1" x 30') PUTTY TAPE - Molds to the shape you need. WATERPROOF - Perfect for waterproofing RVs, trailers, motorhomes, boats, etc. SEALING - Non-hardening with excellent sealing properties, increases in adhesion with age. DIMENSIONS - 1/8 inch x 1 inch x 30 feet. COLOR - Off-white.