SEM 39133 Flexible Primer Surfacer - 13 oz.

Dem is a good product

Worked great on a new bumper install for a 2005 Honda Accord.

Fills in bumper imperfections perfectly

First the spray nozzle is cheap and doesn't fan out enough. It also had a tendency spudder on the surface that I was painting. So I had to keep stopping and clean out the nozzle. I really suggest buying a spray can holder. After three coats it did cover. The surface was very rough so I wet sanded it with 800 grid. And smoothed out the sputter spots. After all that it came out well. For the price I didn't seem to be that good except for the fact it's flexible which I needed.

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.

SEM has been one of the better made products that cost less than products like 3M. Doing a quick repair on the lower part of my front bumper. Wax and grease remover on the area. Sanded out the damage with 220 grit. 2-3 wet coats of the SEM flex primer and let sit 1 hour (very warm day but in the shade). No adhesion promoter used. Primer was dry and ready to sand out with 400 grit wet. Feathered back fine. Prepped the rest of the area to blend and finished the repairs with Duplicolor paint and clear. Has been out in the sun and repairs are looking fine.

Terrible. Even after shaking the can for a long time, the nozzle sputtered periodically producing blobs of primer. Coverage was pretty poor and so was the adhesion. I’ll probably need to sand it all off and start again using a different product.

I use it for spot repair on rubber bumper covers

Hides imperfections well dries fast and sands easily