High temperature silicone O-rings are the preferred sealing solution for applications requiring reliable performance across a wide temperature range, from -65°F to 450°F, making them ideal for food processing, medical equipment, aerospace, and automotive cooling systems. At Mutual Screw & Supply, we carry high temperature silicone O-rings in a full range of AS568 standard and metric sizes to keep your operations running without interruption—browse our selection below or contact our team for expert assistance.