GMNA 9984120 PDF

This specification covers the pretreatment, paint materials and some processing requirements for waterborne, black, cathodic electrodeposition primers (ELPO or e-coat) generally used on small parts. Paint durability requirements are also included. Exterior body metal referenced to this specification must meet the provisions outlined under section 1.2, Typical Applications. These requirements apply to ELPO coating applications that require low, medium and high film thickness.

Material Description. This specification is intended to assure that the ELPO materials used on parts supplied to General Motors are high quality and environmentally acceptable. Materials containing lead or hexavalent chromium are no longer acceptable on parts referenced to this specification.

Typical Applications. This specification covers parts that are ELPO coated outside of GM Assembly Plants, including those parts that may receive subsequent topcoats. These requirements are primarily intended for parts that would not be considered exterior body metal. However, in some instances, replacement body metal may be referenced to this standard. When this occurs, the exterior body panels must be coated using ELPO materials that are equivalent to OEM body products. These ELPO's will be identified in the Comments section of materials approved to, and listed in, MATSPC.