This specification covers the qualifications and performance requirements for flexible, exterior, one-component (1K), solventborne basecoat/one-component (1K), solventborne clearcoat topcoats for use over plastic substrates, typically thermoplastic olefin, over a bake latitude of approximately 115° C to 135 °C (240 °F to 275 °F). This topcoat system is not intended for use on large exterior surfaces such as fascia, spoilers, and rocker panels on vehicles produced for the North American market.

Material Description. Basecoat components of these systems are typically one-component (solvent) acrylic/melamine. Clearcoat components of these systems are one-component (solvent) technologies with varying cross-linking chemistries, but typically acrylic/melamine. Typical volume solids as sprayed are typically 35% to 50% for basecoats and 45% to 60% for clearcoats. Each combination of specific basecoat and clearcoat must be tested and approved as a basecoat/clearcoat system. The individual components are not interchangeable, and are approved for use only with combinations of basecoat/clearcoat of the total paint system which was used in the qualification testing. It must also be compatible with specific adhesion promoters and/or primers used with specific plastics. 1.1.1

Material Identification.

Each combination of specific basecoat and clearcoat must be tested and approved as a basecoat/clearcoat system. The individual components are not interchangeable, and are approved for use only with combinations of basecoat/clearcoat of the total paint system which was used in the qualification testing. It must also be compatible with specific adhesion promoters and/or primers used with specific plastics.

Symbols. Not applicable.

Typical Applications. These topcoats are designed to be applied over a primer or adhesion promoter. All thermoplastic polyolefin substrates using 9984852 must be applied over an adhesion promoter (9984808 or 9984810) or flame treatment per GMW16133.