Sponge-Rez is a tough, clear, ultra-flexible resin forumlated to mend the most common types of catastrophes bodyboards are heir to; worn-out leash anchors, creased bottoms, delaminated decks, hulls or rails, sponge-deck (also known as rash-deck) and semi-fatal gouges. Sponge-Rez works on all types of bodyboard materials including Ethafoam, Surlyn, EVA, Vinyl, and Arcel, however it will melt styrofoam (EPS) cores. Sponge-Rez alsp repairs cracked, weathered swim fins. If applied to the fin blades, it increases their stiffness and thrust.