GMW GMW16920 PDF

This specification details the requirements of a pumpable, weld-through sealer. The material is applied in a body shop or fabrication plant and is intended to cure in the E-coat oven. The material must be capable of being either manually or robotically applied and is intended to seal body joints against water, dust, air intrusion and corrosion.

Material Description. The material must be a smooth and homogeneous mixture free of air, lumps, unmixed particles or foreign materials.

The material must be capable of being dispensed with approved and validated production displacement pumping and application equipment.

It must not have a noxious or toxic odor in either the uncured or cured state.

In addition, the material must not adversely affect the personnel handling it.

The material must adhere to all GM globally approved steel substrates.

The material must be compatible with GM globally approved metalforming lubricants and must not cause defects in the phosphate, thin film or E-coat layers. In addition, it must not have corrosion-causing ingredients, such as polyvinyl chloride (PVC).

Typical Applications. This material is typically applied to bare, oily steel in the body shop of the assembly plant. It is designed to cure in the plant E-coat ovens. It is not designed for application in the paint shop.