McMasters Koss supplies custom molded rubber parts and seals for automotive and industrial OEMs worldwide. Our products include custom rubber seals, washers, boots, grommets and plugs, available in a range of shapes, sizes, materials and colors to meet your specifications. We help match materials and manufacturing methods to your application’s sealing, protection and performance requirements.

From design assistance and prototyping to inspection and material testing, our team supports your project through development and production. Whether you need a custom O-ring shape, a molded washer or a protective rubber boot, we can help evaluate your requirements.

Contact our sales engineering team to discuss your drawings, operating conditions and production needs.