Because this self-adhesive high-density foam-rubber tape is used as a gasket to seal hatches, also know as Hatch Tape.
Dimensions are 3/4” wide by 7/16” thick, sold in 10'-long rolls. One roll is enough for two hatches.
We’ve selected this tape because of its durability and great sealing properties. We've been using it since 1991 with consistently good results. This is the same gasket material included in all CLC kayak kits.