Profile: Polymil Products, Inc. manufactures fiberglass fans and corrosion resistant air handling equipment. Our product line includes fan propellers, axial fans, centrifugal fans, louvers, dampers and exhaust fans. Our hooded roof fan features include smooth interior for efficient air flow & creates a resin-rich, impenetrable surface to airstream corrosives. Our exhaust stacks are used for dispersion of fumes & preventing these fumes from re-entering buildings.