DuFlon Polymers [Pvt] Ltd. Manufactures Ferrous-Non-Ferrous Sand and Investment Casting. DuFlon Polymers [Pvt] Ltd. Has received an ISO 9001:2000 certification. Ferrous-Non-Ferrous Sand and Investment Casting is used in general engineering, fluid handling [valves, pumps, pipes, fittings] and automotive and chemical.