Butyl Rubber (IIR)
Butyl rubber is the material of choice when gas impermeability is the non-negotiable design requirement — pharmaceutical stoppers, medical device seals, aerospace fuel cell bladders, and vibration isolation mounts where air, nitrogen, or process gas retention is critical. Its isobutylene-isoprene chemistry delivers the lowest gas permeability of any commercially available elastomer alongside outstanding ozone and weathering resistance, making it the compound of choice in pharmaceutical and clean-room sealing where outgassing control is equally important. H-O Products carries butyl rubber in commercial industrial durometer grades and FDA/pharmaceutical-compliant formulations, and converts them to customer specification.
40 Durometer Butyl (IIR) Sheet
40 Durometer Butyl (IIR) Sheet is a soft-durometer chlorinated butyl rubber sheeting compound meeting the requirements of ASTM D2000 M1AA407, with a service temperature range of -40 to +180°F, a tensile strength of 1015 psi minimum, and elongation of 400% minimum. The material is compliant with REACH, RoHS, and California Proposition 65 and is manufactured in the USA. The soft durometer profile and high elongation make this grade well suited for applications requiring an IIR elastomer with maximum conformability and flexibility, including chemical-resistant gaskets, pharmaceutical seals, and steam system components.
Key Properties
- Hardness, Shore A: 40 ± 5 (ASTM D2240)
- Tensile Strength: 1015 psi min (ASTM D412)
- Elongation: 400% min (ASTM D412)
- Service Temperature Range: -40 to +180°F
- Specification: ASTM D2000 M1AA407
- Compliance: REACH, RoHS, California Proposition 65
50 Durometer Butyl (IIR) Sheet
50 Durometer Butyl (IIR) Sheet is a medium-soft butyl rubber sheeting compound meeting the requirements of ASTM D2000 M1AA507, with a service temperature range of -40 to +180°F, a tensile strength of 1100 psi, and elongation of 450%. The material is compliant with REACH, RoHS, and California Proposition 65 and is manufactured in the USA. This grade delivers the highest tensile strength and elongation values in the Butyl (IIR) Sheet line, combining mechanical performance with the inherent low permeability, chemical resistance, and weathering resistance characteristic of butyl rubber.
Key Properties
- Hardness, Shore A: 50 ± 5 (ASTM D2240)
- Tensile Strength: 1100 psi (ASTM D412)
- Elongation: 450% (ASTM D412)
- Service Temperature Range: -40 to +180°F
- Specification: ASTM D2000 M1AA507
- Compliance: REACH, RoHS, California Proposition 65
60 Durometer Butyl (IIR) Sheet
60 Durometer Butyl (IIR) Sheet is a medium-durometer butyl rubber sheeting compound meeting the requirements of ASTM D2000 M1AA607, with a service temperature range of -40 to +180°F, a tensile strength of 1015 psi minimum, and elongation of 300% minimum. The material is compliant with REACH, RoHS, and California Proposition 65 and is manufactured in the USA. This grade is suited for general industrial gasket and sealing applications requiring a mid-durometer butyl elastomer with documented ASTM material specification, low gas permeability, and resistance to weathering, ozone, and polar chemicals.
Key Properties
- Hardness, Shore A: 60 ± 5 (ASTM D2240)
- Tensile Strength: 1015 psi min (ASTM D412)
- Elongation: 300% min (ASTM D412)
- Service Temperature Range: -40 to +180°F
- Specification: ASTM D2000 M1AA607
- Compliance: REACH, RoHS, California Proposition 65
70 Durometer Butyl (IIR) Sheet
70 Durometer Butyl (IIR) Sheet is a firm-durometer butyl rubber sheeting compound meeting the requirements of ASTM D2000 M1AA707, with a service temperature range of -40 to +180°F, a tensile strength of 1015 psi, and elongation of 200%. The material is compliant with REACH, RoHS, and California Proposition 65 and is manufactured in the USA. At 70 Shore A, this grade provides the highest compression resistance in the Butyl (IIR) Sheet line and is suited for sealing applications where dimensional stability under load, resistance to extrusion, and the inherent low permeability of butyl rubber are all required.
Key Properties
- Hardness, Shore A: 70 ± 5 (ASTM D2240)
- Tensile Strength: 1015 psi (ASTM D412)
- Elongation: 200% (ASTM D412)
- Service Temperature Range: -40 to +180°F
- Specification: ASTM D2000 M1AA707
- Compliance: REACH, RoHS, California Proposition 65
