Top critical review
Skeptical that it will hold on polypropylene plastic
Reviewed in the United States on April 14, 2018
I used this on a polypropylene chair arm and I'm skeptical it will hold. I did a test area of a small 1 inch blob on the back and I was able to use a chisel the next day as a lever to break the seam and pop it off. It was completely smooth and didn't hold to the poly. For the actual application I roughed up the area with a dremel grinding bit and used some solvent to clean to clean the area so I hope that helped. The bonder was sticky when mixed but a little runny I thought (closer to pancake mix than peanut butter), so to get it to settle properly I positioned the chair arm with the backside up and the area I was applying (on the back) as level as possible. When I would apply it it would flow somewhat it but only went where I wanted it because of the way I had positioned it.
The sister product 50133 (tan) says on the J-B Weld website that it works on polypropylene. This one however does not say that but since it seems to be nearly the same in every other way but the color so I thought maybe it was an oversight. I wrote them and never heard back, and so I decided to order anyway. If they write back or the arm breaks off or there are new developments I'll update the review.
Also one more thing: It doesn't have a strong smell like a lot of other products like this, which is good!
Update 2018-04-27: It broke again right at the seam where the black glue meets the polypropylene. It barely adhered at all, it was a clean break. I have yet to hear back from the company about whether this glue supports polypropylene but empirical results say not really. Perhaps there's an adhesion promoter that would help, but instructions don't say anything about that.