Automotive Aftermarket Products & Systems Catalog - Ben's Paint ...

3M TM Auto Glass Replacement InstructionsFull Cut Method Without Dam MaterialsUsing 3M TM Fast Cure Auto GlassUrethane — High Viscosity (PNs 08689,08690 or 08566) or 3M TM Auto GlassUrethane Windshield Adhesive — HighViscosity (PNs 08696 or 08698)The following instructions cover replacement procedurefor urethane bonded automotive windshields using the fullcut out procedure without the use of a dam material. Highviscosity urethane products provide windshield supportwhile the cure is attained to provide structural strength.1. Organize all tools, product and equipment needed.Wear appropriate safety equipment, such as Nitrilerubber, Butyl rubber, chemical resistant gloves, safetyglasses, apron or other protective equipment requiredby safety or company regulations.2. If necessary, remove windshield wiper arms and trimnecessary to expose the entire perimeter of glass.3. Clean dirt and debris from around the pinchweld areabefore cutting out the glass and again after the glassis cut out to minimize contamination.4. Cut into existing urethane around entire perimeter ofglass with a utility knife cutting as close to edge of theglass as possible.5. Cut out glass with appropriate removal tools keepingas close to the glass as possible. Remove windshieldand repeat Step 3.6. Dry set the glass. Align for uniform fit and adjust settingblocks as needed for best fit. To allow for sufficientbonding of urethane, make sure there is a MINIMUMof 1/4-inch of glass, in addition to the space that willbe taken up by any dam material, around the entireperimeter of the glass. Mark location by applyingmasking tape to windshield and car body. Slit tape atedge of glass. Remove windshield.7. Remove major portion of old urethane adhesive fromthe pinchweld. Use a razor blade knife or utility knifeto prevent scraping paint off the pinchweld andexposing bare metal. NOTE: On urethane installations,it is recommended that a thin film (1–2 mm) of the oldurethane be left on the pinchweld and fresh urethaneis bonded to remaining film. When removing butyltape or unknown material, remove all old materialfrom pinchweld.8. Prime any bare metal scratches with 3M TM Single StepPrimer (PN08681). NOTE: When excessive abrasivecleaning is required, prime pinchweld metal with a 2part epoxy automotive paint primer and allow to cureproperly. Apply 3M TM Black Primer (Step 2) to repairedarea and allow to dry for at least 5 minutes.9. Preparing the glass.Single Step Primer:a. Clean inside surface of glass with 3M TM Glass Cleaner(PN08888) and a lint-free paper towel to clean thesurface where the urethane bond will be made.b. Verify the primer and urethane are within use by dates.c. Shake 3M TM Single Step Primer (PN08681) for atleast 30 seconds before application.d. Apply 3M TM Single Step Primer (PN08681) to theouter edge of the glass where the urethane bondwill be made and allow to dry for at least 10 minutes.Two Primer System:a. Clean inside surface of glass with 3M TM Glass Cleaner(PN08888) and a lint-free paper towel to clean thesurface where the urethane bond will be made.b. Verify the primers and urethane are within use by dates.c. Apply a thin film of 3M TM Clear Primer (Step 1)(PNs 08683, 08685 or 08691) to the outer edge ofthe glass where the urethane bond will be madewith a clean unused dauber. Wipe off excessprimer while still wet with a clean lint-free papertowel. Allow primer to dry for at least 5 minutes.(Repeat this step for a total of two applications).d. Apply 3M TM Black Primer (Step 2) (PN08692) overthe primed area of the glass. Allow primer to dry forat least 5 minutes.10. If a foam dam was used in the OEM application it issuggested that foam dam material should be replaced.11. Cut tip to desired shape and size to provide a beadheight sufficient to give good contact with thewindshield around the entire perimeter. A triangularshaped notch will provide the desired bead shapeand height. A height of 1/2 to 9/16-inch and a 1/4 to5/16-inch base is suggested. NOTE: Where installingencapsulated glass, apply a bead high enough toassure glass contact before encapsulation contactsthe car body and prevents further setting. Backpaddling material after setting will not be possible.12. Apply 3M TM Auto Glass Urethane WindshieldAdhesive—High Viscosity or 3M TM Fast Cure AutoGlass Urethane—High Viscosity directly onto theOEM urethane film on the pinchweld or directly tothe glass.13. Position the glass by aligning the masking tape onglass and car body. Press glass in place to assurecomplete contact with the urethane adhesive.14. Paddle squeeze out around edge of glass if possible.If necessary, paddle additional adhesive betweenglass and car body to fill voids.15. Remove masking tape alignment strips.16. Replace moldings, windshield wipers and other trimremoved in Step 1.17. Clean any excess urethane with an adhesive cleaner.Auto GlassInstallation169