Simply 50139 J-B Weld PlasticBonder- Black,25 ml

Very strong and effective- had to repair a rear bumper where the leading edge clip had sheared leaving it flapping around the rear wheel arch- stuck it down very well and has already last several months

It just works. Despite some reviews stating that it is "too wet" and wrongly criticising the incredibly simple cap, this stuff is easy to mix, easy to use (when applying a little common sense) and absolutely tough as old boots. Twist and pull off the cap to open the twin tube dispenser and give the tubes a few taps to make sure there's no air trapped in either, push the plunger to squeeze out the 2 components, ensuring that they come out in equal amounts, mix well and, unless you need a really liquid material, leave for around 5 minutes, possibly even a little longer if you're using it on a vertical surface, so that it thickens up a bit. Do make sure to replace the cap the right way round, though - quite easy to do, since the component liquids are black and white. Once applied, it sets in 20 to 30 minutes (rarely the 15 minutes stated on the packaging), so you will have time to shape and smooth it as it starts to cure and might need to hold, clamp or tape a joint in place for a while. Other than that, once it has fully cured (I ended up leaving it for 24 hours, just to make sure, as it was still soft enough to indent with a fingernail, even after a couple of hours) it is both sandable and any overspill can be cut off or shaped with a sharp blade. I can only guess that those who have said it "didn't set" hadn't taken care to make sure there were equal amounts of the two components before mixing, as it is much like any 2 pack type adhesive or filler - too little hardener/activator means the product won't cure and harden. Honestly, when mixed and applied correctly, this product is so good that I have absolutely no issues with it and have ordered more for various other plastic repairs I need to do! Given how good it is, I think it's pretty good value, too.

Was struggling to find a two part adhesive strong enough to reattach a front DRL fitting inside a car bumper/fender. No issues so far but although instructions state a curing time of one hour, I left the fitting clamped up overnight to ensure it was firmly attached as any undue vibration may have affected the bond and required the front of the car removing again. Just make sure the packing states ‘Plastic’ as there are several different versions by this maker in similar looking packs.

Would have been 5 stars but let down on trying to get the liquid out of the syringes, like some others I had struggle get the white part of the mixture, which seemed odd as the liquid was very soft. After a few times trying to get it out I sperated them was a bit easier but still bit difficult. Not sure why this maybe be some about a batch of faulty syringes. Has the product was as expected very strong & started going off after 15 mins. Left for a few hours and it was good to put back on my bike.

A really good plastic glue. A must if you're 3D printing and assembling parts. Very controllable if you're careful with how you push the syringe down - you can push out and mix small quantities and make your purchase last a good while. It's black and it sets black, but then I expect a lot of people are 3D printing with black filament where it blends in nicely. Despite the claims, you do get a stronger bond if you clamp for 24 hours. I've found this to be necessary when gluing metal to plastic, but for plastic to plastic applications then the manufacturer's recommended glue-setting times still hold true. Even better if your parts slide or click together in some way, so you can just add a dab of this glue and carry on - job done. For the price, the use you can get out of this glue, and its inherent strength, it's got to be 5 stars. I would like to try the Sealey structural MMA glue just for comparison purposes, but for most jobs, this will more than do.

This is great stuff, the tubes are great no mess just twist off the cap and squirt it out, due to the tube design the glue is not going off between uses, sets quickly in approx. 30mins but fully cured in 24hours, then its rock hard and does not budge, great for me for all the little fixes, handy to have a tube ready to go, I also use the JB marine weld. fully recommend.

Used this to attempt a repair on a cracked car boot trim plastic panel - with mixed results. The product description doesn't say it is only marginally compatible with polypropylene. Also, the stated cure time is way too short - it takes 48h+ at 20C to fully harden. The trim panel had a crack at the corner of an access hole for the rear lamp cluster about 4" long. I applied JB Weld to the interior of the trim panel where it's not visible, to fix both halves of the crack in place. 1st attempt: mixed using the supplied wooden spatula and the packaging "mixing tray". No prep on the plastic panel except for degreasing and cleaning. Gooped up the interior of the panel and worked the compound into the crack. Left to set overnight in a warm garage at 20-25c. Next morning, after 16 hours, the remainder in the mixing tray and on the panel was a slightly pliable tacky mass, like sun-baked chewing gum. Also, the bead that I had laid on the trim panel had started to come away from the plastic at the edges. 2nd attempt: scraped the half-hardened epoxy off with a razor blade and sanded the area with 120 grit sandpaper and degreased (again). Mixed another batch with a proper spatula and bowl, and gooped the crack again. Left in the sun, with plastic temperature approx 50-55°C for about 4 hours. Noticeably harder after this than the first time. Adhesion appears to be much better, and the edges still adhere to the plastic. Time will tell whether it holds up.

Very strong

15 euros de contra Ren bolso aparte del producto

I bought this after doing some online research when my son accidentally broke the passenger-side mirror on my new 2026 Honda CR-V. The electronics, glass, and adjustment functions were still working perfectly, but the rotation/base area of the mirror had become loose, and I really did not want to spend around $300–$400 replacing the complete mirror assembly for one damaged section. I tried other products first without success, so I decided to give the J-B Weld Plastic Bonder a shot. I was honestly impressed. After applying it to the damaged area and holding everything in the correct position, within roughly 7 minutes the mirror already felt solid with practically no movement. For this type of repair, the bond feels extremely strong. Application is pretty straightforward, especially with the dual syringe that dispenses both components together. My main recommendation is to protect the surrounding area with painter’s tape before applying it. If you squeeze the syringe too aggressively, more product can come out than expected, and this stuff is definitely something you don’t want spreading over painted or visible surfaces. For me, this turned what could have been a several-hundred-dollar repair into a very inexpensive DIY fix. The syringe is also resealable, so I can keep the remaining product for another repair. Pros: Strong bond, sets quickly, easy to mix and apply, works well on automotive plastic, inexpensive compared with replacing the whole part, and reusable. Minor caution: Control the syringe carefully because it can dispense more adhesive than you need. Overall, this was a very impressive repair product and absolutely worth trying before replacing an expensive plastic automotive component that is otherwise still functional.

The best. I used it for my EV car charger handle that was broken and it’s working perfectly

Werkt perfect

Excelente pegamento, pega muy duro y es resistente