HETRON FR 650 Series resins are flame retardant polyester resins. Composites made with HETRON
FR 650 Series resins have been tested and have achieved a Class 1 Flame Spread per ASTM E-84
without addition of synergists such as antimony trioxide.
HETRON FR 650 T-20 resin is a low viscosity, promoted, thixotropic, version. It exhibits excellent wet-out
properties and low drainage when applied to vertical surfaces. This resin is formulated to contain 35%