Scotch-Weld Structural Plastic Adhesive DP8010, Blue, 45 ml Duo-Pak

Expensive, but strong. Definitely worth it if you need to make a critical repair, especially on low surface energy materials that don't take to traditional adhesives. A tab completely snapped off of my polypropylene car bumper, and this was able to easily and securely reattach it. I was amazed at how strong the repair was over a very thin and narrow bond line. However, it does come with its quirks. First, you need to have the proper dispensing gun: I got a compatible generic one off of eBay since the genuine 3M guns are expensive, especially for a DIYer. Next, you definitely want to get the 3M mixing nozzles. Getting the right ratio squirting and mixing by hand is very difficult; I tried this once and it probably had just a little to much activator which significantly reduced the work time. Finally, it's a little harder to work since it's thicker and doesn't really run. You also need to make sure the repair gap isn't so small that all the adhesive gets squeezed out, or else your repair won't stick. For those types of really thin/close fitting repairs, you might be better off using superglue and a LSE material primer since it's a lot better at wicking into cracks

They say that for many types of plastics, this is absolutely *the* best adhesive you can possibly get. You *do* need mixing tips; you should use the special gun to extrude it as well. I had the special 10:1 tips, and improvised the gun with my laser cutter. Still, neither of the two things I glued with it worked at all. Now, I'm no polymer materials engineer or plastic chemist, so maybe I just happened to pick the wrong types of plastics (and the AI I consulted about it was also wrong), but I'm pretty sure this isn't going to make a bond that's anywhere near as strong as the underlying material (like you can get with other materials and adhesives). And not only is this stuff expensive, all the paraphernalia you need to use it is also expensive. Also, word to the wise: Lots of chemical products say "use in a well-ventilated area", etc., and most of us nod and avoid huffing whatever it is. I definitely recommend you use this stuff in a *well*-ventilated area. It's definitely an eye/airway irritant.

I glued the hardtop on my 1997 Geo Tracker, with a Pro-Top hardtop. It worked perfect super strong. Takes 2 days to dry. Make sure you find the correct gun to dispense it. Only 2 companies offer it.

way over priced

I purchased this glue to stick some Tefzel plastic brackets to the side of a gearbox that runs at around 115 Centigrade. Tefzel is the chemical name for Teflon so this is one heck of a challenge to stick teflon to something that has a surface temperature hotter than boiling water. This stuff works and you could hand 10lbs off the brackets after it stuck. There are just 2 drawbacks. It takes about 4-6 minutes to set even when the surface is already at 115C so for vertical surfaces you need to mechanically hold it in place whilst it sets. The other drawback is cost. Holy mackerel is this stuff expensive. For a one-off application it made sense but I wouldn't like to be paying for this stuff regularly.