Versatile Seal Can Be Used as Bottom Sweep, or Vertically on Bi-Fold Doors Snap on Application 31 in Lengths This CRL Clear Dual Durometer PVC Seal and Wipe has two uses: Snap it on door bottom and the soft lip acts as a wipe; snap it on an overlapping bi-fold door and the soft lip acts as a seal. Stock Length: 31 in Glass Thickness: 3/8 in