PVC Foam tape for weather stripping, gasketing, cushioning, gap filling Low density (between 6-10 lbs/cubic ft.)Foam Tape is used extensively in the automotive, HVAC and construction industries to provide air & weather tight seals; for gasketing, cushioning, vibration control in speakers, vehicles, electronic components and door frames. Also for filling and sealing gaps around windows, doors, and car/SUV tops for better insulation. It is a clean, waste free substitute for liquid sealants.