Skylark V6-173 2.8L VIN X 2-bbl (1984)
Windshield: All Technical Service Bulletins
Windshield - Two-Part Urethane Adhesive For Installation
File In Section: 10 - Body
Bulletin No.: 73-10-54
Date: May, 1997
Two-Part Urethane Adhesive For Windshield Installations
1997 And Prior Passenger Cars and Trucks
(Using Urethane Adhesive To Retain Windshields)
General Motors passenger cars and trucks use urethane adhesive as a means to retain the windshield in the body opening. The urethane adhesive is used
to bond the windshield in the opening, increasing vehicle structure.
The current recommended urethane adhesive, GM P/N 12346284, is a one-part moisture cure product that requires a minimum curing period of 6 hours
at room temperature before returning the vehicle to the customer.
Increasing customer demands for faster service in recent years have resulted in quicker cure two-part urethane adhesives.
Essex Beta Seal U216* (two-part urethane adhesive) meets the General Motors 3651M Specification (Performance Requirements for Stationary Glass
Bonding Adhesive System Service) and can be used when the customer demands quicker repair of the vehicle than the current one-part materials can
Either of these products can be used when glass replacement is performed. The differences between these products are as follows:
The CURRENT URETHANE ADHESIVE KIT, GM P/N 12346284, IS A ONE-PART ADHESIVE. It includes the necessary glass and pinchweld
primers and is specified in Service Manuals for General Motors' vehicles. Since this is a "moisture cure" product, the curing time for this one-part
material will vary with changes to either temperature or humidity. The REQUIRED TIME FOR THIS ONE-PART
MATERIAL to ensure a safe installation of stationary glass before returning the vehicle to the customer IS A MINIMUM OF SIX (6) HOURS AT 70°F
(21°C) AND 30% RELATIVE HUMIDITY.
ESSEX BETA SEAL U216 IS A TWO-PART ADHESIVE MATERIAL THAT PROVIDES FOR A ONE (1) TO ONE AND ONE HALF (11/2)
HOUR CURE BEFORE RETURNING THE VEHICLE TO THE CUSTOMER. This product also requires primers on the glass and pinchweld surfaces.
This product requires a special applicator for the mixing and dispensing of the adhesive.
When using this (or any) product, make sure to follow the manufacturer's directions for application and drying times.
Parts are currently available from GMSPO.
* We believe this source and their product to be reliable. There may be additional manufacturers of such products. General Motors does not endorse,
indicate any preference for or assume any responsibility for the products from this firm or for any such products which may be available from other