Need to repair your board, fins, or wetsuit? This stuff does it all. It stays pliable even after drying and can be used for repairs of any water equipment. Large Tube (2 oz). WARNING: If your board has an EPS (extruded polystyrene) core, SpongeRez will damage that material and is not recommended. Repairs many, many substrates except Styrofoam.Need to repair your board, fins, or wetsuit? This stuff does it all. It stays pliable even after drying and can be used for repairs of any water equipment. Large Tube (2 oz). WARNING: If your board has an EPS (extruded polystyrene) core, SpongeRez will damage that material and is not recommended. Repairs many, many substrates except Styrofoam.