Butyl (isobutylene, isoprene rubber) is produced
by many companies in different types and varies widely in
isoprene content. Isoprene is necessary for proper vulcanization.
Butyl 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.
- Many acids
- 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.
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