Full Description

This specification details the requirements of waterborne, sprayable sound damper (Liquid Applied Sound Damper (LASD)).

The purpose of this material is to reduce vehicle metal noise vibrations excited by engine, tires, transmission and stone impingement.

The material is applied in the paint shop after electrocoat and shall be capable of robotic application.

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.

The material shall be a smooth and homogeneous mixture that contains no lumps, air, unmixed particles, or foreign materials.

The material shall be capable of being dispensed with approved production pumping and application equipment.

The material shall not exhibit a noxious odor or adversely affect personnel handling it at any time.

The material shall not contain corrosion-causing ingredients.

This bake-able material shall adhere to all GM globally approved production electrocoats.

The material shall be compatible with electrocoat, sealer, primer surfacer, topcoat and interior component systems.

Symbols.

Not applicable.

Applicability.

The material reduces resonant vehicle vibration of metal panels by adding damping to selected areas. The material can be applied to typical acoustical hot spots, such as the floor pan, toe pan or rear cargo/trunk floors. Where material rheology and vehicle build conditions allow, the material may also be used on the plenum, door panels and roof panels.

Remarks.

None.