3M 08609 Window-Weld Super Fast Urethane Black Cartridge - 10.5 fl oz.

Used this to repair my convertible top rear glass window, to re-attach the convertible top material to the glass. Flexible and easy to apply. If you follow the instructions, it does a great job and so far is weatherproof. Just don't let it dry on your skin, it will have to wear off since no solvent will touch it after it cures.

The product is great! 3M is a Top Notch company and I can always trust their products. Amazon, however, is not very reliable. I have ordered this product and it was received without the dispenser tip. I returned it and received a replacement. This too was without the dispenser tip. A call to 3M confirmed that the product should come with a dispenser tip. I further learned that Amazon is presenting that support should come from 3M, but 3M confirmed that they are not selling products directly to the public, which includes thru Amazon. 3M stated that they have been trying to get Amazon to stop having customers calling them for these sort of problems. Come on Amazon, get with the program! Don't take a great product and make it virtually unusable by not shipping all the parts ... twice now.

Used this on my 2009 Audi A4 Convertible top glass rear window and it is holding extremely well. It has amazing sticking power, dries pretty fast.My only caution is when doing a window on a convertible top, you don't need a huge amount to do a good repair. I cut the bead line too big and I put too much material between the top and the glass window. I also used the CR Lawrence Suck and Clamps to hold down the top to the glass. So the combination of too much material and really tightening the clamps too tight, I made a mess and had a lot of material ooze out onto the glass. Also, I tightened down the clamps so tight that I must have forced some of the material up through the fabric, so that when I removed the clamps I had visible stains on the outside of the convertible top. However, my top is 9 years old, and this repair should get me another two years until I can buy a new one. Listed below are my recommendations.1. Make sure to buy the primer that goes with this and use it.2. Raise the top ever so slightly to take the pressure off it, then brace it so it doesn't drop down. I used rags under the back of the top and a cardboard box between the top and the front window.3. If you have a lot to repair, consider doing it in small steps, it's much easier that way.4. Use thin disposable gloves, have several extra on hand. If you get any material on the gloves, put on a new pair.5. Cut a small bead line, and apply a thin coat to the sealing area between the glass and the top material.6. Use the CR Laurence clamps, but don't tighten them too tight, only enough to get a good touch seal so the bonding material makes good contact. An alternative to the clamps could be one or two automotive inner tubes or pool toys, that you brace inside the car and then inflate to allow them to put pressure on the glass from inside the car.7. If any material oozes out onto the glass, loosen the clamp a little and allow the material to set up for about an hour. Then you can take the clamp(s) off and very carefully cut the xtra material using a razor blade. Be very careful not to fray the top with the razor blade. At this point the material doesn't need a lot of pressure to cut off, and light pressure on the blade will easily cut it. Re-apply the clamps.8. Starting within 30 minutes of applying the material, gradually ease the pressure off the clamps until after about 3 hours you can completely remove them.9. I let the repair set for two days before I drove the car.10. Take your time, it's not really hard to get a good repair.

I was extremely happy with how this adhesive worked ... I followed directions found on the internet using suction cups, 3M primer, primer spreader sticks/balls and 3M Window-Weld urethane adhesive w/wood strips to spread the load. I was particularly pleased with the good initial tack and the extended open time of the adhesive. This allowed me to move the glass and stretch the top while my son perfectly aligned the fabric to the existing glue line resulting in a very near perfect repair.The rear glass bond had failed very quickly (over 2-3 days) resulting in over 3/4 of the glass coming loose. First the top section separated and by the time my supplies arrived the passenger side had separated past the corner and half way across on the bottom.It took 3 separate "gluing" sessions to bond it all back up over a 2 day period. The first 2 sessions re-glued the bottom section and the upper corners leaving the full width of the top glue-line for the final session. BTW - The picture of the passenger side of the glass is the trial-fit and does not show the use of continuous spreader-sticks around the corner. I don't think the "After" picture shows it but there is a small flaw in the bead across the top ... I had too much space between the clamps and I did not get perfectly consistent squeeze-out in one small section.The important note is that by saving the "tip" from the glue cartridge I was able to plug-it-up and keep the adhesive from drying out so I could continue to use it as each section cured (4-5 hr minimum). In hindsight, I should have done the final top section in 2 parts but I was (incorrectly) concerned that the adhesive would dry out in the tube before I could get the full window re-glued.Excess primer drips/runs and Window-Weld adhesive squeeze-out was of no concern. A razor knife cleaned it all up both perfectly and quickly.It has been a week since the repair and there is no evidence of the adhesive failure ... I expect it to last longer than the rest of the original 13 year old top. If the last of the original/factory installed bond fails I will not hesitate to order again and repair it in exactly the same way. Totally satisfied.

Good, strong product. Make sure you have a quality caulk gun, the first one I used bent and broke because this stuff is so thick.