scope:

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Material Description. This specification covers a silicone foam material used for sealing various components within a General Motors vehicle. These silicone foam materials are recommended for applications where the normal temperature range is -55 °C to +200 °C.

Material Class.

• Class I - Open Cell

• Class II - Closed Cell

Typical Applications. This material is used as a primary seal for air, dust and automotive fluids where exposure to high temperatures and low compression set is a factor. Materials can be produced in continuous roll, sheet or cast bun blocks. Products qualified to this specification shall be identified by compression force deflection ranges per ASTM D1056 at 25% compression.

Type 1. This is a low modulus (soft cellular) foam, which can be easily compressed and used as noise isolation and as an air, dust and fluid seal.

Type 2. This is a medium modulus (medium cellular) foam, which can be easily compressed and used as noise isolation and as an air, dust and fluid seal.

Type 3. This is a firm modulus (firm cellular) foam, which can be easily compressed and used as noise isolation and as an air, dust and fluid seal.

Remarks. These materials are considered low-density silicone foams.