General Motors Company

Adhesive/Sealant, Room Temperature Vulcanizing, Oxime Cure for Engine Sealing Applications - Issue 3
 N 9982257

Annotation

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 silicone adhesive/sealant requires no catalyst or heat to cure. When applied wet (uncured) it reacts with moisture in the air (condensation cure) releasing a Methyl Ethyl Ketoxime (2-Butanone) (MEKO) by-product and fully cures to an elastomeric product, adhering to most clean surfaces without need of a primer. Adhesively bonded and fully cured adhesive/sealant acts as a barrier against oil migration across mating surfaces.

Symbols. Not applicable.

Applicability. Formed-In-Place Gasket for sealing engine covers, pans or mating of other components for oil seal integrity or to restrict dust or unwanted air and water intrusion. This product is intended for oil use only.

Application Temperature and Assembly Sequence. Unless otherwise specified by the adhesive/sealant manufacturer, apply this adhesive/sealant on the intended surface whose temperature is from 18 °C to 40 °C. Below 20 °C adhesion and cure rate slows. It is the responsibility of the applicator and the adhesive/sealant manufacturer to establish the accepted conditions, e.g., process time from applied bead to assembly to air test, temperature and adhesive/sealant cure rate to provide acceptable adhesion and leak test performance. See Assembly, Sealing and Fastening Bill of Materials (BOM) Level II for minimum process time.

Continuous Usage Temperature. Up to +175 °C as defined by SAE J2236 (see 3.2.2.1 and Table 3). Use temperature as a material strength measurement, not related to adhesion performance.