Urethane (Polyurethane) O-Rings

Urethane (aka Polyurethane) is a great material that can take a punch. Urethane has high physical durability and unique physical properties that are derived by its structural bonds. This material is composed of a combination of soft poly segments and tough isocyanate segments which produces a flexible and durable elastomer. Polyurethane has two main types that have unique benefits but carry the same physical strength as urethane. Polyester Urethane is the most common variety of urethane and has great resistance to hydrocarbons and hydraulic oils but can be damaged by hydrolysis. Polyether is also great with fuel and oil but is also resistant to being damaged by hydrolysis and can function at lower temperatures.

Learn more about Urethane in APG's Knowledge Base.