EXTREN® Fiberglass 525 Construction Grade Flat Sheet


Contact us for product pricing and availability 269-344-0009

Current Stock:

Warning for California residents.

EXTREN® is a proprietary combination of fiberglass reinforcements and thermoset polyester or vinyl ester resin systems. It is produced in more than 100 standard shapes and all shapes have a surface veil to protect against glass fibers penetrating the resin surface in service, and to increase corrosion and UV resistance.


  • UV Resistance
  • Corrosion resistant
  • Low conductivity – thermally and electrically
  • Non-magnetic – electromagnetic transparency
  • Lightweight
  • High strength
  • Dimensional stability
  • Low maintenance