Profile: National Plastics & Seals, Inc is a distributor of O-rings, heat shrink tubing, plastic rods, sheets, tubes, machined plastic parts, punched parts, phenolics and sleeving. Our products include rod and sheet, tubing, heat shrink tubing, sleeving, expandable monofilament sleeving, film, rubber products, tape, compounded resins & recycled resins. We offer fabrication services. We serve agriculture, aerospace, construction, medical and automotive industries. We are accredited with ISO QS9000 certification. Our brands include H/S Sumitube™.