To give you the best possible experience, this site uses cookies. By continuing to use the site, or by staying here, you agree to our use of cookies in line with our Privacy Policy. Learn more including how to manage cookies here.

Butyl Rubber (IIR)

Butyl (isobutylene, isoprene rubber, IIR) has a very low permeability rate and good electrical properties.


Heat resistance

• Up to approximately 121°C (250°F).


Cold flexibility

• Down to approximately -59°C (-75°F ).


Chemical resistance

• Hot water and steam up to 121°C (250°F).

• Brake fluids with glycol base (Dot 3 & 4).

• Many acids (see Fluid Compatibility Tables in Section VII).

• Salt solutions.

• Polar solvents, (e.g. alcohols, ketones and esters).

• Poly-glycol based hydraulic fluids (HFC fluids) and phosphate-ester bases (HFD-R fluids).

• Silicone oil and grease.

• Ozone, aging and weather resistant.


Not compatible with:

• Mineral oil and grease.

• Fuels.

• Chlorinated hydrocarbons.

Parker Hannifin
O-Ring & Engineered Seals
2360 Palumbo Drive
Lexington, KY 40509
Ph: 859-269-2351
Fax: 859-335-5128