GMW15979

Description / Abstract: GMW15979, 3rd Edition, February 2019 - Sealer, Global, Pumpable, High-flow Roof Ditch - Generic Qualification

Material Description.

This specification details the requirements of a paintable, high-flow sealer. The material is applied in the paint shop after the Electrocoat (E-Coat) bake before primer surfacer and is robotically applied. The material is intended for application to the exterior (horizontal) roof ditch joint and must provide an extremely smooth, seamless appearance bead. It must also be compatible with production primer surfacer and topcoat systems and exhibit excellent painted appearance, durability and painted appearance equivalent to the performance of Class 1 exterior topcoat systems.

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

It must be capable of being dispensed with approved and validated production displacement pumping and robotic 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 those personnel handling it.

The material must adhere to all approved production E-Coats.

It must not have corrosion-causing ingredients.

Symbols. Not applicable.

Applicability. Sealing of exterior (horizontal) roof ditch joints after the E-Coat oven but before primer surfacer application