3M Scotch-Weld Instant Adhesive Primer AC79, Clear, 2 fl oz Bottle
Thumbnail 1

3M Scotch-Weld Instant Adhesive Primer AC79, Clear, 2 fl oz Bottle

4.2/5
Product ID: 47209036
Secure Transaction

Details

  • Brand
    3M
  • Specific Uses For Product
    Repair
  • Material
    Silicone
  • Compatible Material
    Rubber
  • Item Form
    Paste
Fast drying
🌱Eco-friendly compliant
🔧Easy application

Description

🔗 Instant adhesion, instant success!

  • ECO CONSCIOUS CHOICE - California compliant for a greener workspace.
  • EFFORTLESS APPLICATION - Straightforward surface prep for hassle-free use.
  • VERSATILE COMPATIBILITY - Works seamlessly with a variety of materials.
  • ACCELERATE YOUR PROJECTS - Fast-drying formula keeps your workflow uninterrupted.
  • BOOST YOUR BONDING POWER - Enhances adhesion on flexible elastomers like silicone and TPE.

The 3M Scotch-Weld Instant Adhesive Primer AC79 is a 2 fl oz bottle designed to improve adhesion on flexible elastomers, including silicone and TPE. Its fast-drying formula and straightforward application make it ideal for quick projects, while being compliant with California regulations.

Small manufacture image 1Small manufacture image 2Small manufacture image 3

Have a Question? See What Others Asked

What are the ingredients?
How is this applied? Does it come with an applicator of some sort?

Reviews

4.2

All from verified purchases

R**R

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

S**N

Bonds 3M tape like superglue

If you work with 3M tape you will love this primer. The tape has a much stronger adhesion..

E**E

Really Sticks

I am gluing silicon rubber to a stainless steel washer; a very difficult task. I first used just Scotch Weld PR40, plastic and rubber adhesive. I abraded the washer and rubber with 150 grit sandpaper. After 24 hours the rubber peeled off fairly easily. I repeated the experiment but used the Scotch Weld AC70 brushed on the abraded rubber. After 24 hours the rubber stuck very well even while pulling with considerable force! The primer and abrading are essential!

M**S

It’s very liquid rolls off quickly

I used it on some silicone sleeve tubing, it’s rolls off very quickly, it needs to be applied to the other surface like 3m tape or what ever you are trying to stick

T**Y

Bonds the impossible, but does it really, really quickly!

This made it possible to bond something I was told couldn’t be done: silicone. The problem is, it accelerates the bonding process. It makes it almost impossible to get things lined up when you’re dealing with floppy silicone. I suggest using it with a formula that allows longer working times.

B**N

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.

J**E

More Than Just Acetone

This is *not* just acetone like you can buy in a can or nail polish remover. Acetone is simply what is used to dissolve the ingredients that are actually important. These compounds aren't hazardous so they don't need to appear on the SDS.This stuff works. If you try using just acetone you'll find that it doesn't. 3M makes great stuff. Use this primer with their instant adhesive for plastic and rubber.

M**L

Makes Scotch Weld Cure Fast!

Purchased this to go alongside my Scotch-Weld. It does a good job of priming surfaces like plastic and glass and makes it set quicker so I don't have to carefully hold it in place while it dries.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Shop Global, Save with Desertcart
Value for Money
Competitive prices on a vast range of products
Shop Globally
Serving over 300 million shoppers across more than 200 countries
Enhanced Protection
Trusted payment options loved by worldwide shoppers
Customer Assurance
Trusted payment options loved by worldwide shoppers.
Desertcart App
Shop on the go, anytime, anywhere.
19968 Ft

Duties & taxes incl.

Hungarystore
1
Free Shipping

with PRO Membership

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

3m Scotch Weld Instant Adhesive Primer Ac79 Clear 2 Fl | Desertcart Hungary