For 1990-2009 cars

# REV. TO ADHESIVE CAULKING KIT, NEW PRIMERS & PART NUMBERS

---------------------------------------------------------------------- INFORMATION ----------------------------------------------------------------------

#### SUBJECT: REVISIONS TO ADHESIVE CAULKING KIT, NEW PRIMERS AND PART NUMBERS; NEW EXTENDED METHOD PROCEDURES

#### MODELS: 1994 AND PRIOR CARS AND TRUCKS USING URETHANE ADHESIVE APPLICATIONS (STATIONARY GLASS, ROOF PANELS, ETC.)

RECENTLY, SOME CHANGES WERE MADE TO THE CURRENT ADHESIVE CAULKING KIT, GM P/N 12345633.

THE NEW URETHANE ADHESIVE CAULKING KIT, GM P/N 12346284 CONTAINS SOME ADDITIONAL PRIMERS, AND HAS BROADER APPLICATIONS THAN THE PREVIOUS KIT. THE CONTENTS FOR THE NEW KIT INCLUDE:

- 1 - CARTRIDGE OF URETHANE ADHESIVE - 1 - NOZZLE FOR URETHANE CARTRIDGE - 1 - 10CC BOTTLE OF GLASS PREP PRIMER (CLEAR, #1) - 1 - 10CC BOTTLE OF GLASS PRIMER (BLACK, #2) - 1 - 30CC BOTTLE OF PINCHWELD PRIMER (BLACK, #3) FOR USE ON PINCHWELD FLANGES FOR EXTENDED (LONG METHOD) WINDSHIELD REPLACEMENTS AND URETHANE BONDED S.M.C. PARTS (CAMARO/FIREBIRD ROOF PANELS). - 1 - 30CC BOTTLE OF P V C PRIMER (CLEAR, #4) FOR USE WITH ENCAPSULATED GLASS (MODULES). - 4 - APPLICATOR DAUBERS

INCLUDED IN THE ABOVE CHANGES, IS AN INSTRUCTION SHEET WHICH HAS BEEN MODIFIED TO THE NEW CONTENTS.

ALTERNATE EQUIVALENT MATERIALS FOR THIS KIT MAY BE AVAILABLE FROM A LOCAL GLASS REPAIR SHOP UNDER THE FOLLOWING PRODUCT NUMBERS;

GM KIT PRODUCT EQUIVALENT PRODUCT

- URETHANE ADHESIVE ESSEX # U400 - GLASS PREP PRIMER (CLEAR, #1) ESSEX # U401 - GLASS PRIMER (BLACK, #2) ESSEX # U402 - PINCHWELD PRIMER (BLACK, #3) ESSEX # U413 - P V C PRIMER (CLEAR, #4) ESSEX # U555

OTHER MANUFACTURERS OF URETHANE ADHESIVE THAT HAVE DOCUMENTED THEIR ABILITY TO MEET OR EXCEED GENERAL MOTORS' SPECIFICATION #3651M ARE ALSO CONSIDERED TO BE EQUIVALENT TO GM KIT P/N 12346284.

IN ADDITION TO THE KIT CHANGES, THE FOLLOWING INFORMATION CONTAINS REVISED PROCEDURES FOR EXTENDED METHOD WINDSHIELD REPLACEMENTS.

PROCESS STEPS FOR EXTENDED METHOD WINDSHIELD REPLACEMENTS

WINDSHIELD REPLACEMENTS THAT REQUIRE A COMPLETE URETHANE BEAD APPLICATION. NO (OR SLIGHT) URETHANE REMAINS IN THE WINDSHIELD OPENING.

THIS CONDITION CAN OCCUR AS A RESULT OF:

- THE ORIGINAL BEAD NOT BEING ABLE TO SERVE AS A GOOD BASE.

- COLLISION DAMAGE REPAIR TO THE SHEET METAL IN THE OPENING.

- THE NEED FOR THE OPENING TO BE REPAINTED.

FOLLOW THE PROCEDURES IN THE SERVICE MANUAL EXCEPT IN THE FOLLOWING CASES:

1. WHERE THE EXTENDED METHOD IS TO BE USED WITHOUT DAMAGED SHEET METAL REPLACEMENTS, OR REPAINTING OF THE OPENING IS NOT REQUIRED;

A. APPLY THE BLACK PINCHWELD PRIMER (#3) FROM NEW URETHANE KIT P/N 12346284 TO ANY EXPOSED PAINTED SURFACE IN THE WINDSHIELD OPENING. DO NOT APPLY PRIMER OVER THE EXISTING URETHANE BEAD SURFACE.

B. DO NOT USE THE BLACK #2 PRIMER FOR PINCHWELD APPLICATIONS.

2. WHERE THE EXTENDED METHOD IS TO BE USED WITH DAMAGED SHEET METAL REPLACEMENTS, OR, THE OPENING NEEDS TO BE REPAINTED;

THE BONDING AREA SHOULD BE A PRIMER SURFACE ONLY, AND NOT AN AFTERMARKET TOP COATED (PAINT, OR COLOR COATED) SURFACE. MATERIALS SUCH AS BASF DE17, DUPONT 2610 OR PPG DP40 (OR EQUIVALENT) ARE APPROPRIATE FOR THIS APPLICATION.

#### NOTE: IF BARE METAL IS PRESENT, APPLY AN APPROPRIATE METAL CLEANER AND CONDITIONER PRIOR TO THE APPLICATION OF ONE OF THE ABOVE INDICATED PRIMERS.

A. APPLY A COATING OF PRIMER (AS INDICATED ABOVE) TO THE BONDING AREA OF THE WINDSHIELD OPENING FLANGE, FOLLOWING THE MANUFACTURER'S DIRECTIONS FOR MIX AND DRY TIMES.

B. APPLY THE BLACK PINCHWELD PRIMER (#3) FROM NEW URETHANE KIT P/N 12346284 TO THE PRIMED AREA OF THE WINDSHIELD OPENING FOR ADHESIVE APPLICATION.

#### NOTE: APPLY OVER SURFACES THAT HAVE BEEN COATED WITH PRIMER ONLY. IF PAINT REPAIR IS NECESSARY, MASK THE FLANGE BONDING AREA PRIOR TO PAINTING TO ALLOW A "PRIMER ONLY" SURFACE.

#### PART AVAILABILITY:

PARTS ARE EXPECTED TO BE AVAILABLE ON 10/31/94 AT GMSPO.

FIGURES: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1994 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.