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GMW17845 1st Edition, June 1, 2017 Multi-Purpose Sealer, Global, Pumpable, Paintable; Generic Qualification
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Description / Abstract: This specification details the requirements of a multi-purpose sealer that is high appearance paintable, pumpable, and has improved application capability. This multi-purpose sealer will also be compatible with the three (3)-wet compact painting process which uses waterborne basecoat plus Two-Component (2K) clearcoat topcoat systems. The material is applied in the paint shop after the electrodeposition coating (e-coat) bake, before primer surfacer, and must be capable of being either manually or robotically applied. The material is intended to seal interior and exterior body joints against water, dust, air intrusion, and corrosion. The material must be compatible with primer surfacer and topcoat systems.
Material Description. The material must be a smooth and homogeneous mixture free of air, lumps, unmixed particles, or foreign materials.
It must be capable of being dispensed with approved and validated production displacement pumping and application equipment including: single point streaming, ribbon tip (flat stream), atomized spraying and automated hem sealing.
It must not have a noxious or toxic odor in either the uncured or cured state.
In addition, the material must not adversely affect those personnel handling it.
The material must adhere to all approved production e-coats. It must not have corrosion-causing ingredients.
The material must be capable of bridging varying gap sizes up to 6 mm in size (see 3.1.7).
Symbols. Not applicable.
Applicability. This multi-purpose sealer shall be used for sealing interior, underbody and hem (including door, hood and deck lid hem) seams with the possibility of also being used as an anti-chip rocker/underbody coating on a vehicle body. The sealer may also be used to seal non-exposed roof ditch seams on a vehicle body.
Material Description. The material must be a smooth and homogeneous mixture free of air, lumps, unmixed particles, or foreign materials.
It must be capable of being dispensed with approved and validated production displacement pumping and application equipment including: single point streaming, ribbon tip (flat stream), atomized spraying and automated hem sealing.
It must not have a noxious or toxic odor in either the uncured or cured state.
In addition, the material must not adversely affect those personnel handling it.
The material must adhere to all approved production e-coats. It must not have corrosion-causing ingredients.
The material must be capable of bridging varying gap sizes up to 6 mm in size (see 3.1.7).
Symbols. Not applicable.
Applicability. This multi-purpose sealer shall be used for sealing interior, underbody and hem (including door, hood and deck lid hem) seams with the possibility of also being used as an anti-chip rocker/underbody coating on a vehicle body. The sealer may also be used to seal non-exposed roof ditch seams on a vehicle body.