This specification covers a glass primer used in conjunction with an Isopropyl Alcohol (IPA) or as primer number two (2) of a two (2) step system. Either primer system is used in conjunction with a polyurethane adhesive sealing compound.

Material Description. This material is a black, solvent based, polyurethane type primer used to condition and promote adhesion to automotive glass. It is applied following the application of either IPA, 9981293, or primer number one (1), 9982278, and interfaces a polyurethane adhesive sealing compound, Reference: 9982280. It is intended to be used for glass applications where the primed surface has aged a minimum of 30 s. It is not intended for use at GM assembly plants where the cycle times may be less than 30 s between primer and urethane adhesive application.

Symbols. Not applicable.

Applicability. Materials approved to this specification are intended to be used for priming of automotive glass at a value add location and shipped part of assembly (POA) to the GM assembly facility. This application is commonly referred to as pre-primed glass. In conjunction, the pre-primed glass is bonded to painted automotive body openings to facilitate installation of fixed glass, windshields, rear windows, (backlites and liftgates) and side glass, such as quarter windows.

Remarks. Refer to the glass bonding decision tree of the GM materials engineering Preferred Materials Catalog (PMC) in the exteriors section for specific use of this material.