Available in 48 in. width and 3 in. thickness, EXT single cross section, polyethylene foam plank is produced via extrusion process, which creates homogeneous foam product with dimensional stability. Closed-cell structure makes it buoyant, virtually impermeable to water, and resistant to water vapor transmission. Available in 1.7 or 2.2 lb densities, product can be die cut, heat-sealed, welded, glued, saw cut, split, skived, water jet cut, routed, and drilled to specifications.