3MSingle Step Primer, 08682, Black Color, One-Part Urethane, UV Resistant, 30 mL/1.01 fl oz

Used this to create a better surface for adhesive to stick to on a convertible window repair. It was easy to use, went on quickly without mess and dried quickly as well. I gave it roughly 30 minutes to dry and that seemed to be more than enough.It's black so make sure you understand that before buying it. In 99% of applications the color wont matter but I can see a few with lighter colored cloth tops that might not like it if they mess up the application. Ultimately it wont be showing if done right so the color matters little.I used a makeup brush that my roommate didn't need to apply it because I didn't have any other brush available, and that worked perfectly. The adhesive stuck to the glass and the cloth and everything is working fine. The container is a metal bottle with plastic lid, and a small mixing bead inside. It was not difficult to open and does not leak. If anything changes like it separates or fades or something I may update the review, but for now, 5/5 stars!

Primer works well. Does not come with dobber so had to run to get one at the hardware store

Great product! It does exact as advertised. Be sure to wear gloves. You don’t want it get this on your hands or anything other your desired intended area!

This is a must when using the sealant. It’s easy to use just brush it on. It dries quickly, but don’t get it on your hands.

This primer has great adhesion to glass for automotive applications. I have noticed over the years that old glass does not like to adhere to glue very well. This primer does a great job of curing that problem. Use it to primer the glass before re-installing it in the car. I use it on new glass too, just to be sure.The main problem is that it dries out easily no matter how well you seal the bottle. I have never gotten a full bottle's use out of one.

Used this to prep a glass window in a convertible top. Glass was separating from the canvas. I didn’t think it was fixable or would work. Watched videos on YouTube. Did what they said. Now it is better than factory. Totally watertight seal. Used this primer and 3M windo-weld. You can see in the photo where the previous owner used duck tape (that didn’t hold) instead of fixing it properly. Fix it right and keep your car dry. The adhesion and performance is shockingly good.

Wire wheeled the pinch weld clean of rust and then used multiple daubers to spread it on. Can't use the same dauber due to contaminating the primer in the container. I used like 6-8 daubers. Then spread some on the windshield were the adhesive will stick to and it worked great!

Changed the Quarter Windows in my 1994 Merc Cougar. The window bolts onto an inner frame and there is a urethane seal.Used a window scraper to remove the old urethane. Some wax and grease remover helped to disolve and smooth down what I could not scrape off. I used the 3M 08682 Single Step Primer. The primer is black and goes on like a smooth black paint. You have to get it right the first time. I used a little foam paint brush and trimmed it so it fit in the bottle. It dries hard on the brush so you will have to dispose of the brush. I applied the primer to both the frame and the window.The 3M 08609 Windo-Weld is a thin aluminum (like a soda can) tube. The expiration date is printed on the top of the tube. There is a pull tab on the bottom of the tube. When ready to use, remove the pull tab. You will see an inner platic seal for the caulk gun. You can puncture the tube on top with the punch tool on the caulk gun. I also bought a Newborn 250 with 18:1 thrust ratio. Recommend this caulk gun. The urethane is thick. If handling, you should wear Nitrile gloves. Hand tightening the bolts on the second window, I managed to get some on my hands. The urethane oozed through the bolt holes. The wax and grease remover came in handy to clean my hands.I put down a quarter inch thread that I estimated at 72 inches for each window. Total 144 inches and I estimate I used 70% of the product.Was my first time to use a caulk gun or urethane or change a vehicle window. The caulk gun, urethane, primer, and window scrapper cost about $75. Nice feeling to get it done yourself. Good luck to you.