ESI Super Cap Seal 20 FT (1 1/2" Width x 1/2" Height x 20' Length) EPDM 20ft seal for mounting a truck cap or camper shell that weighs 200 lbs or less. Fills all bed rail gaps. Complete kit includes seal, butyl tape, alcohol pads and detailed instructions High quality, long-lasting automotive grade EPDM rubber. Preferred by professional installers over PVC/foam seals. Excellent compression set resistance for maximum service life and vibration absorption No need to replace this seal every time your cap is removed.