Sponge-Rez is a tough, clear, ultra-flexible resin formulated to repair the most common types of damage bodyboards are susceptible 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 extruded polystyrene (EPS) cores. Sponge-Rez also repairs cracked, weathered swim fins. If applied to the fin blades, it increases their stiffness and thrust.