This cowl mold will make a fiberglass cowl that will fit the Hobby zone Super cub. This Models cowl shape cannot be formed with thick material without webbing forming at the base however, this does not keep us from using it as a fiberglass mold. The plastic is coated with a polypropylene film that should allow you to make several cowls without worrying about mold release. When the coating fails, remove it and apply wax to continue. The mold is made with .040 clear plastic , this allows you to see bubbles or pin holes in the lay-up. Epoxy resin is suggested but polyurethane resin will work.