Chem-Pruf Door Company, P.O. Box 4560, Brownsville, TX 78523. Tel. (800) 444-6924.
Fire-labeled FRP doors and frames are made of corrosion- and heat-resistant, halogenated, flame-retardant polyester resins. They are reinforced with glass mats, antimony compounds and filled with mineral core or fire stop. The doors are rated for 30, 45 and 90 minutes. These FRP doors and frames are certified and tested to specifications of ASTM-E-152, UL 10B, CAN4-104, NFPA 252, and UBC 43-2, fire door test standards.