Hydro Seals: High-Temperature Viton O-Rings and FKM O-Rings for Robust Applications Hydro Seals is your trusted source for high-quality Viton O-rings and FKM (Fluoro elastomer) O-rings designed to withstand extreme temperatures and demanding operating conditions. With our commitment to excellence and reliability, we provide sealing solutions that ensure optimal performance and longevity in robust applications across various industries. Viton and FKM O-rings from Hydro Seals are capable of withstanding a wide temperature range, from extreme cold to high heat. Whether in automotive, aerospace, chemical processing, or industrial applications, our O-rings maintain their sealing integrity in diverse temperature conditions.