Profile: Custom Fiberglass Products manufactures fiber reinforced plastic tanks. Our custom slip-in units include reels, hose, pumps, valves, primers, foam systems, hose trays and operator panels. We create reinforced plastics for fire truck doors, panels and wheel liners. We design plastic tank for the fire industry. Our wet side tanks are built in a multi-layered process of non-corrosive fiber reinforced poly resin.