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3M Scotch-Weld AC79 Clear Instant Adhesive Primer is a 2 fl oz quick-drying primer designed to improve adhesion on low surface energy elastomers like silicone, EPDM, and TPE. Featuring a hardening accelerator and easy surface prep, it enables faster, more reliable repairs while meeting California environmental standards.
| Asin | B071W9H889 |
| Brand Name | 3M |
| Color | clear |
| Compatible Material | Rubber |
| Container Type | Bottle |
| Customer Reviews | 4.2 4.2 out of 5 stars (119) 4.2 out of 5 stars |
| Global Trade Identification Number | 00051115313882 |
| Included Components | Adhesive Primer |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Manufacturer | 3M |
| Material Type | Silicone |
| Model | AC79 |
| Number Of Pieces | 1 |
| Other Special Features Of The Product | Improves adhesion to flexible elastomers and contains hardening accelerator |
| Part Number | 31388 |
| Specific Uses For Product | Repair |
| Unit Count | 2.0 Count |
| Upc | 051115313882 |
| Volume | 2 Fluid Ounces |
| Water Resistance Level | Not Water Resistant |
User
Holy smokes! Works like nothing I have ever used before!
I repair things as a career. Like huge industrial stuff,1000ft long lake freighters, steel mills etc. I have access to so many expensive industrial chemicals and adhesives. None I had found were up to the task on a home project I was doing in my shop. I needed to bond a rubber boot to a part made from POM (Acetal)Both are difficult to adhere to. Nothing sticks to POM and anything strong does not flex with the rubber.LOTS of inter-web research and LOTS of claims and hype.I found that both materials were on an extensive list 3M had of materials P40 is comparable with.They were NOT kidding!It worked even without the primer!Like my first try I mis-located the boot a bit..... Too late! It is still stuck right where I put it.This stuff is ultra thin! Some part in the description says gel. NO!BUT! the way this stuff wicks into the gaps and stuff makes this all the better for me.I assemble the parts exactly where I want, a single drop at the joint......and it's capillary action pulls this stuff right where it needs to be!I've used it on a few more things playing around.THIS STUFF WORKS!HIGHLY RECOMMEND!The primer is a must have IMO.It gives the best chance at a successful bond, especially for difficult plastics.YOU PRETTY MUCH GET 1 SHOT AT IT!Ray the Maker
User
3M clobbered it!
I was skeptical, but 3M nailed it. I used this product (along with Scotch-Weld glue for silicone) to bond silicone to silicone and it worked perfectly! Easy to use, takes very little, but bonds incredibly strong! It is pricey, but worth every penny. Does exactly what it says and does not take long to work. Easy to hide seams. This stuff is my new favorite way to bond silicone parts together! Thanks 3M!
User
Makes crazy good bonds, fixes nearly everything
This Scotch adhesive is now my go to for difficult to bond materials. I haven't had it to fail yet. I've bonded rubber items, plastics, and hinges on headphones and it made quick, super strong bonds each time. This is the cyanoacrylate adhesive that you are looking for.
User
Dont buy this expensive acetone!
I know propylene is hard to stick. That is why I bought this primer to go with an adhesive that specifically requires a primer. Unfortunately, even though I applied it to a cleaned surface multiple times, the adhesive kept flaking off. It smelled like acetone, so I am very pissed that I bought 20ml acetone for 50$. I will try to return it.
User
It's plain old acetone!
It's plain acetone. Don't waste your money! It does have a cute little brush attachment tho.
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