3M Scotch-Weld Plastic & Rubber Instant Adhesive PR40, Clear, 20 Gram Bottle

This adhesive worked great for my project which was to bond some 3D printed (PLA) items to polyethylene (HDPE). After 24 hours of curing the two items were bonded together as if they were one. There was a lot of surface area for the connection that I was bonding so perhaps my situation was optimal for this product but I couldn't be happier with the result. There's not a lot of instructions included, so it might be helpful to know how I used the product: - I started with both surfaces to be bonded in a horizontal position. The adhesive (and the primer are very thin and runny and this is the only way to minimize the mess. - I masked off the non-bonding areas with blue painters tape to further reduce mess. - I first primed the pieces by brushing the entire (cleaned) area for be bonded with acetone. Acetone is cheap and I had some (from Home Depot) so I decided to try it as an alternative to the expensive but official 3M primer. - I applied a thin layer of adhesive to the HDPE side, spreading it about a bit with a wooden stir stick. - I joined the pieces, clamped them together and carefully wiped away the excess with a paper towel. Note that the bonding is not immediate. Out of an abundance of caution I left the clamps on for 24 hours. Maybe another process would work as well, but that worked great for me. You end up using a very small amount of adhesive so the little bottle goes farther than you might think. To be honest I had serious doubts that anything would work to bond HDPE, and was amazed at how well it ended up working. Good luck!

I bought this industrial glue because the residential super glues weren't meeting my needs. The 3M glue dries ridiculously fast and holds very strong. It's exactly what I was looking for. There's a reusable cap that actually keeps the glue fresh and ready for an other project.

Great very powerful bonding it did the job bonding a rubber seal on my car door

Good Product, Good Seller, On Time!

I did a ton of research trying to find a glue to bond a soft plastic tablecloth fabric to a hard smooth plastic surface. I knew the usual glues that i use in my crafts were not going to adhere to the hard plastic. This stuff really works exceptionally well! It did not melt my fabric at all either. There was one small section that had some regular material as reinforcement over the hinge (that I left in place) that had some other kind of glue under it and there was a tiny amount of smoke when I glued over that but it was only for an second or two. I'm super grateful for the advice to wear gloves because my hands definitely would have been covered had I not because it is very runny. I also used shop towels to both absorb any excess glue and to press things into place - that worked great too. I'll definitely be purchasing more of this glue for future projects. I noticed that the directions on amazon mentioned using a bonding primer when joining polypropylene and polyethylene and I wasn't sure if I needed that but I didn't. I'll definitely be purchasing the primer too in case I need it in the future with this glue. BTW, I found the directions on the bottle impossible to read even with my bifocals! I highly recommend getting this glue!!!

I have used this product to repair plastic, rubber and ceramics. It works quickly and creates an amazingly strong bond. Though the bottle is small, it takes very little product to create the bond.

It does not work for rubber at all

This is my second bottle of the "3M" PR40. I have been surprised at how well it works on rubber and hard plastics. I have not tried it on HDPE but do not expect it would work well. I have repaired inter tubes, butted "not lapped" together inter tube material to make large rubber band, glued hard plastic parts back together, and even cut/spliced a used serpentine belt as a replacement belt on a old south bend metal lathe. It also seems to work on what I call siliconized rubber but have not done a durability test on that other than giving it a few yanks. It only takes a thin even amount on one surface with Good pressure to work - I always keep my bottle upright during storage and never had the tip plug. If lap jointed it will always break elsewhere on rubber and not the joint. OBTW I always clean the rubber with brake cleaner and wipe dry.

Works great for nitrile o-ring cord

Funcional.

Cumplió muy bien para pegar plástico en auto de lujo

This stuff is dangerous: now I can glue just about anything! Would highly recommend wearing disposable gloves when using this though.

Excelente calidad y precio