Simolex Rubber Corporation manufactures a large variety of vulcanized silicone O-rings, from silicone cords, silicone tubing, silicone squarerectangular, and from custom extruded gaskets. And variety of different rubber compound that are approved by UL, ASTM 2000, NSF STD-51, USP CL-VI and FDA 21 CFR177.2600. Available hardness from 20 shore A up to 80 shore A. They are fabricated with a unique vulcanizing technique which makes the joints as smooth as molded parts. We can also join hollow cross sections in a way that the joint has the same compressibility as the length of the gasket.