Klean-Strip Bulldog Adhesion Promoter for Plastic, Metal, and Aluminum – Quick Dry No Mix for Paint Prep Jobs – Fills 320 Grit Scratches – 1 Quart

Like
Good product

very effective
It works very well but be very thorough with your application. i inadvertently missed one small area. Guess where the paint has already flaked off. Operator error! Product is excellent and my unintentional experiment proves what would have happened if i hadn’t used this adhesion promoter.

Must be applied correctly
There aren’t a lot of choices when looking for adhesion promoters – and Bulldog seems to be the big dog in the lineup. But it doesn’t work if you don’t apply it correctly. I will admit that I am only a hobbyist painter, but I have sprayed a fair amount and fought through numerous problems – enough that I feel like I have a pretty good handle on what it takes to get a good paint job. I give Bulldog only 4 stars, because there seems to be a lack of good info on how to use it properly to make it work. I have painted a plastic bumper (twice) a plastic fender, and most recently the plastic fender flares on my truck. Each time bulldog was used, but even so I had to redo the bumper and my fender flares. Way back when I first tried painting plastic, I used the bulldog spray can. At that time, the instructions on the can said “spray a light mist coat, wait 5 minutes, spray a second light coat. Did this, and it failed. Asked a guy in the paint shop where I bought it, and he gave me some advice that in hind sight was really bad. No clue where he got that, but I now know it goes completely against the “newest” bulldog instructions. Fast forward to recently painting my fender flares. Tried following the instructions of two light coats again, and it failed – again. Went to a different paint shop, got some different info from a different guy. And he was nice enough to print up a 4 page bulldog data sheet that detailed how to use it correctly. That’s another reason for Bulldog losing a star – I had emailed them detailing my prep work and asking if they could suggest improvements that might give better results – no answer. So, the bulldog instruction sheets say – first, after removing all mold release, wax, oil and grease, do NOT use a SOLVENT based cleaner after that point. They want you to clean with their plastic cleaner stuff – I used fine sandpaper to not only clean it, but to abrade it and give something for the paint to latch onto. Some will say that if you use sandpaper, the plastic is soft enough that the sanding marks will show. But I was planning to prime anyway. Thoroughly rinse with water and let it get good and dry. Now, here is where the bulldog instructions have changed. The advice for two light coats has been replaced with instructions to apply a medium wet coat and let it dry. I suspect that the two light coats wasn’t putting enough product on the plastic to create the proper chemical bond needed to make paint stick reliably – but that’s just my guess. I also think the spray cans are rather ineffective for anything larger than a spot repair. So I chose to purchase a quart of bulldog liquid and shoot it through my gun. This gave me a much wetter, more even coat – which I then let dry ( instructions say up to 24 hours ) for about 30 minutes. The other bonus to having the liquid in a can, is that you can add a little to your paint to make it more flexible. I used a 4:1 primer with enough bulldog mixed in to be about 4 : 1 : 1/2. I went down very nicely, and the following day, sanded very nicely. Everything seemed securely bonded, so I sprayed basecoat and clearcoat, and my fender flares look great. The times my paint jobs failed, I knew it as soon as I sprayed basecoat – it would start to wrinkle or lift even before the basecoat flashed. No such trouble this last time. I think I have a paint job that looks nice and is well bonded to the plastic. So, bulldog does work – but as with anything in painting – proper preparation and application is absolutely necessary.

Seller Honesty
Bought a quart Bulldog from this seller, when received. The lid was loose enough that some material leaked out, which probably was manufacturer’s fault and not seller. But when I notified seller, another quart was shipped right away. Honesty and integrity is this sellers moto.