Satyen Polymers offers General Purpose Polyester Resin. Satyen Polymers manufactures and supplies Unsaturated Polyester Resin [UPR]. The General Purpose Polyester Resin - Ortho GP Plain Type s a quick curing unsaturated polyester resin based on Orthophthalic raw material for laminating purpose. It is un-accelerated. The General Purpose Polyester Resin is suitable for both hand lay up and gun spray up. The resin offers excellent mechanical properties, impact and water resistance. The general purpose polyester resin performs best if the laminate is completely post cured. The quantity of catalyst and accelerator can be adjusted to get a shorter or longer gel time.