... FDA No Flash EPDM, NBR, CR Viton Rubber O Rings Application Dynamic Seals FDA No Flash EPDM, NBR, CR Viton ... Rubber O Rings Application Dynamic SealsO-rings are donut-shaped rings used in industry ... off or prevent leakage of fluid or gas in an application. The o-ring functions as a seal when installed ... No Flash EPDM, NBR, CR Viton Rubber O Rings Application Dynamic Seals