GMW GMW18478 PDF

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.

Material candidates for this specification should improve the stiffness of body panels as well as reduce noise and vibration, serving a dual purpose as a stiffener and damper. The pumpable material will be applied in the body shop robotically to oiled automotive substrates, including but not limited to cold rolled steel, electro-galvanized, hot dip galvanized steel, and aluminum substrates, coated with production processing oils. The pumpable material shall withstand production paint process of Alkaline Hot Cleaning Solution dip, Phosphate/Zirconium dip and Electrodeposition Primer Operation (ELPO) dip operations without sagging, sliding, or washing away from the original placement. The material shall also be compatible and cure within the production ELPO, primer/surface and topcoat bake operations exhibiting temperatures up to 190 °C.

Symbols.

Not applicable.

Applicability.

This material provides additional stiffness and/or improves resistance to “oil canning” or deflection of exterior body panels. The material also serves as an acoustic barrier to reduce noise in the interior cabin.

Remarks.

None.