This specification covers the qualification and performance requirements of low solids, high bake, solventborne basecoat (BC) technologies that may be applied to either flexible or rigid substrates. These BCs can be used under one (1) component or two (2) component clearcoats.

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.

Purpose/Material Description.

Each combination of specific basecoat (BC) and clearcoat (CC) shall be tested and approved as a basecoat/clearcoat topcoat system. The individual components are not interchangeable. In addition, the topcoat system is part of the total coating system and shall meet the requirements as outlined in GMW3005, those set forth in this specification, and on the engineering drawings. Validation testing for plant specific layering, ancillary materials, and processing shall be conducted prior to release. The nominal bake for this topcoat system is 25 minutes at 154 °C (310 °F) substrate temperature. Volume non-volatile solids range of this technology is typically (10 to 25)%.

Symbols.

Not applicable.

Applicability.

These topcoats are designed to be applied over a baked primer.

Remarks.

Not applicable.