Using the M-D Building Products Camper Seal Tape will form a weather - proof barrier between your topper / camper / shell and your vehicle. It also blocks out air and moisture. The M-D Building Products Camper Seal Tape will make the difference between being comfortable or being cold. Which would you rather be?Features Seals the gap between camper and truck panels, or anywhere a wider foam tape is needed Protects trucks contents from water, air and dust Easy self - adhesive application Prevents drafts, noise and vibrations Specifications Width:1-1/4" Thickness:3/16" Color: Gray Length: 30'