Profile: T-lon Products, Inc. offers hydraulic/pneumatic seals and sanitary gaskets. Our products include spring energized seals, hydraulic/pneumatic seals, billets, valve and sanitary gaskets. Our spring energized seals are available in standard & custom rod, piston and face seal designs. Our PTFE-R piston seals is made of fluorinated polymer used in combination with a square rubber loader ring or an elastomer o-ring.