Cyber Essentials Certified

Butyl Rubber (IIR)

Types of Gaskets and Materials
Waterjet Cutting Service
Rubber Gaskets
EPDM Gaskets
Neoprene® Gaskets
Silicone Gaskets
Viton™ Gaskets
Nitrile (Buna-N) Gaskets
SBR (red rubber) Gaskets
Butyl Rubber Gaskets
Natural (gum) Rubber Gaskets
Polyurethane Gaskets
Food Grade (FDA) Gaskets
Cork & Cork Rubber Gaskets
Compressed Non-Asbestos Gaskets
EMI RFI Shielding Gaskets
Electrical Insulators
High Temperature Gaskets
Fiber Gaskets
Felt Gaskets
Foam Gaskets
Kapton® Gaskets
PTFE (Teflon®) Gaskets
Silicone Sponge Gaskets
Closed/Open Cell Sponge Gaskets
Flexible Graphite Gaskets
Custom Non-Metallic Washers
Plastic Gaskets
Flange Gaskets
Electrical Enclosure Gaskets

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