Scotch-Weld Epoxy Adhesive DP420, Black, Two-Part Epoxy Structural Adhesive, High Impact and Fatigue Resistant, Maintains Bond Strength, 50 mL (1.69 fl oz) Duo-Pak

I used this to bond an aluminum insert into a carbon fiber tube that required very high strength. Worked excellent and is still holding after 4 months of daily abuse. Highly recommended if bonding metal to composite. Easy to use after purchasing the dispenser gun and nozzles.

What it says on the tin there. Was gluing together some performance functional replacement parts that I had to split into twos or threes because of print volume limitations. This stuff bonded it together without a hitch. You need to get the Adhesion Promoter (and be CAREFUL with that- it's industrial chems and dangerous if you don't adhere to the ROE they give you on the packaging for that.) because it won't bond NEARLY as good to the PC-CF or similar. Once there it applied with the mixing nozzles and the gun like a dream. Simple. Easy. It's now in my toolbox of things to fabricate stuff with. Do read up on 3M's info on this stuff before reaching for it. It's technically Industrial Chems itself and you need to know what you're working with before purchase.

3m consistently makes really good products. This epoxy is the best I've ever used. I've used it for about 16 years in my business. Having black is helpful, but the quality is great. TIP: Read the product application data. Good surface prep is important. Warm the repair it to 120F and hold it there. This speeds the cure rate, and drops the time need to cure to full strength from 24 hrs down to about an hour, and it's stronger too. When buying, check the manufacturing date and shelf life. There are vendors out there who shamelessly sell out of date product. (not with this order!) Out of date product may not work as well. Adding: 5/24 I received another tube today. The seller put their in stock label over the bottom of the product label, covering the date code etc. which is printed on the 3M label when the epoxy is made. Their label adhesive lifted the obliterated the date code when I tried to remove it. What's dumb is that they put the epoxy in a poly Ziplock bag before mailing it. Why didn't they put their stock label on the bag?

I bought this to repair a carbon fiber spoiler with an aluminum hardware insert that had been damaged in a hit-and-run. After cleaning and preparing the carbon and aluminum I flooded the gaps with this epoxy and let it set up overnight. Seems to be working perfectly, you can't even tell the spoiler was hit except for the scuffs on the side. and so it does exactly what it promises.

This is exceptional adhesive but why do you pay for it. Almost 50 bucks.