PVC Foam Tape is a medium density closed-cell polyvinyl Chloride foam. The tape provides an excellent combination of flexibility and conformability with strength and wear resistance.Performs in those“tough duty”applications where tape must still flex to fit and seal. Characteristics common to all closed-cell vinyl foam products include the ability to make a long life seal against air, moisture, light and dust penetration. Closed-cell vinyl foam completely seals out air, moisture, light and dust when compressed 30% or more.