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)
• 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
