XTREME SEAL edge seal is a new, high-tech extrusion engineered and manufactured with the most advanced E.P.D.M.1 material available. The profile of XTREME SEAL edge seal is a closed-cell, flexible material that can be glued or sewn to most materials and surfaces. The flexibility and unique design of XTREME SEAL edge seal creates a three-point-contact seal on most surfaces. Great for keeping a water tight seal around snap fastened boat tops. 5 foot minimum.