... unsaturated polyester resin matrix , alkali-free fiberglass as a reinforcing material Fiberglass Grating based on unsaturated polyester resin ... ships deck , the House of plank and other . Lightweight, high strength , corrosion-resistant flame retardant , non-magnetic insulation , ... platforms , stair treads , ditch cover , bridge walkway , filter plates , fillers such as a stent , is ideal load ...