GMW GMW15520 PDF

Material Description. The requirements listed in this specification must be met by all interior paint systems used in all GM vehicle interiors. Paint systems must follow the steps in Figure 1 to complete the paint approval process of a part.

Symbols. 

Paint Haptics. For a paint material approval, the paint system is required to be listed as approved in the

GM Materials File (MATSPC) system. Paint systems approved to this specification shall be required to carry a type suffix to indicate the haptic feel that it has to the human skin. The suffix system shall be: 

• Type A: Soft Touch
• Type B: Fabric Feel 
• Type C: Hard Touch 
• Type D: Semi-soft Touch 
• Type E: Metallic

Type A and Type D haptic feel must be approved by the Global Haptic Lead prior to evaluating the paint system performance. 

Basecoat/Clearcoat (BC) Applications. Basecoat plus clearcoat systems approved to this specification shall be approved with the symbol (BC) following the haptic suffix. 

Applicability. This specification covers requirements for an interior, waterborne or solventborne, one or two component paint system for use on parts made of paintable olefins including rigid thermoplastic polyolefins (TPO) and polypropylenes (PP). All substrates must be tested per GMW16172 to confirm paintability. 

Remarks. TPO and PP substrates can be pretreated by priming, fluorination, chlorination, plasma, flame, etc. A single pretreatment is required to achieve initial paint approval. The initial paint approval shall be linked to the specific pretreatment as listed on MATSPC. Additional pretreatments using the specific approved paint must be evaluated per Column 1B in Table 1 and added to the comments section of the initial MATSPC approval.