Better Boat Butyl Tape for RV Roof and Boat, 36 Feet Black Putty Window Sealant Tape, Waterproof Weather Resistant, 3/4 Inch Wide x 1/8 Inch Thick — Open-Box, 17% Off

STOPS WATER BEFORE THE DAMAGE SHOWS INSIDE: By the time moisture stains a ceiling or warps a wall panel, it has been moving through the framing for months. Seal every roof seam, window frame, and hatch edge before the first rain of the season.

PEEL THE LINER AND PRESS TO SEAL, NO GUN NEEDED: Remove the PE liner, press the putty compound firmly into the gap, and smooth it flush. No mixing, no caulking gun, no cure time. Bonds to fiberglass, metal, rubber, vinyl, and wood on contact.

36 FEET PER ROLL COVERS A FULL JOB IN ONE PASS: Most butyl tape is sold in 10 to 20 foot rolls, which forces splicing partway through the job. Every splice is a potential leak point. At 36 feet, most window reseals and roof jobs run end to end.

STAYS PLIABLE LONG AFTER SILICONE AND CAULK CRACK: Silicone and acrylic caulk harden and crack when surfaces flex or temperatures shift. Butyl putty compound stays permanently flexible, conforming to gaps as the vehicle moves and seasons change.

WARM THE PUTTY BEFORE APPLYING IN COLD WEATHER: Below 60 degrees, knead the tape in your hands for 30 seconds. Cold butyl stiffens and conforms less evenly. Better Boat is a family owned American company based in Miami Beach, Florida.

Water finds gaps. A slightly parted window frame, a roof seam that shifted after last winter, a vent flange that no longer sits flush any of these lets moisture work its way inside. By the time it shows up as a stain or soft spot, it has been sitting in the framing for weeks. Butyl tape is a putty compound, not a pressure-sensitive tape. It comes rolled on a PE liner. Peel the liner, press the putty into the gap, and smooth it flush with a finger or roller. No caulking gun. No mixing. No cure window to wait out before driving. It bonds on contact and stays permanently pliable, conforming to the joint as the vehicle flexes or temperatures shift. Unlike acrylic caulk and rigid sealants that harden and crack over time, butyl putty holds the seal through movement and seasonal expansion. Each roll is 36 feet long, 3/4 inch wide, and 1/8 inch thick. At 36 feet, one roll handles most complete window reseals, roof vent replacements, and hatch flange jobs without running short. Most competing rolls are 10 to 20 feet. Shorter rolls force splicing mid-job, and every splice is a potential new failure point. Works on RV roof seams, slide-out frames, window flanges, vent bases, hatch surrounds, and any joint needing a flexible waterproof seal. Also used on boat window frames, trailer light housings, and marine hatches. Bonds to EPDM rubber, fiberglass, aluminum, vinyl, ABS plastic, and wood. Available in White for bright window frames and light-colored trim, Black for dark rubber seals and tinted frames, and Gray for aluminum trim and factory gray finishes. Select your color above. Better Boat is a family owned American company based in Miami Beach, Florida.