39863 Plastic Adhesion Promoter Aerosol - 14.8 oz.

Did its job helping me epoxy and patch a hole in a plastic bumper on a 2020 Traverse. I've done similar jobs without using this and I can say the adhesion time was noticeably quicker and cured out stronger as far as I can tell.

facilitates adhesion

I painted a couple filler panels between tank and fairings on my Honda motorcycle. I used this as it was recommended by SEM, also the maker of the top coat I had chosen. It goes on thin so no real buildup in thickness of the paint which is desirable. If you follow directions it will not run. I top coated using multiple light coats and the result is a professional looking paint job. These products are not cheap but sometimes you have to do it right when painting a high value project. I would recommend this product to anyone.

We purchased all the spray products, from the adhesion promoter, primer, color coat, and clear coat satin finish. In addition to following the can direction, we also followed some very specific technique directions we found on the internet, about painting plastic dashboards (which was the project). Basically, follow all can directions, GENTLY and LIGHTLY WET sand the surfaces with 800 grit, dry, and clean well with alcohol before starting. Start with adhesion promoter, follow can instruction. Then spray primer, color, and clear coat in 2 - 3 very light coats, each, and when you finish all primer coats, wait 24 hours to start color coats, and do the same when color coats are done, and you are ready to clear coat the piece(s). We allowed all of that to dry for 48 hours, before reinstalling. It looks wonderful. Not like we just spray painted a dash. It's a hard finish, and no chips or scratches when it was re-installed in the vehicle. Compared to spray paint, it's a little pricey, but it was well worth every penny.

I used this on a vinyl window frame before painting it. I have tan vinyl windows in my house and white interior trim. It did not look so good and I wanted to paint the interior part of the windows white. I used this to prime the window after sanding the frames before painting them with white spray paint. This really improved the adhesion of the spray paint. The paint has held well for many years. I have also used this to prep plastic bumpers before painting and it works well for that also.

Works great!!

Paint sticks to this stuff really good!

Must be used before applying sem color coat. You need to test the plastic with acetone, this only works with plastic that doesn't gum up when rubbed with acetone. If it gums up you need sem sand free adhesive.