--- product_id: 744700643 title: "3M Scotch-Weld AC79 Clear Instant Adhesive Primer, 2 fl oz Bottle" brand: "3m" price: "€ 145.88" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.sk/products/744700643-3m-scotch-weld-ac79-clear-instant-adhesive-primer-2-fl store_origin: SK region: Slovakia --- # Quick-drying formula California compliant eco-friendly Enhances adhesion on tough elastomers 3M Scotch-Weld AC79 Clear Instant Adhesive Primer, 2 fl oz Bottle **Brand:** 3m **Price:** € 145.88 **Availability:** ✅ In Stock ## Summary > ⚡ Stick faster, bond stronger, work smarter! ## Quick Answers - **What is this?** 3M Scotch-Weld AC79 Clear Instant Adhesive Primer, 2 fl oz Bottle by 3m - **How much does it cost?** € 145.88 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/744700643-3m-scotch-weld-ac79-clear-instant-adhesive-primer-2-fl) ## Best For - 3m enthusiasts ## Why This Product - Trusted 3m brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bond Like a Pro:** Optimized for flexible elastomers including silicone, EPDM, and TPE for unbeatable adhesion. - • **Speed Meets Precision:** Quick-drying primer accelerates your workflow without compromising quality. - • **Effortless Surface Prep:** Simplifies installation with easy surface treatment—get the job done faster. - • **Eco-Conscious Compliance:** California compliant formula aligns with your sustainability values. - • **Hardening Accelerator Inside:** Built-in hardening agent ensures a durable, long-lasting bond every time. ## Overview 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. ## Description 3M Scotch-Weld Instant Glue Primer AC79 is designed for use with low surface energy elastomers that are difficult to bond such as EPDM, silicone and other rubber. Surface preparation and installation is easy, adhesive primer is quick drying, making it easier to work faster. ## Features - Improves adhesion to flexible elastomers including silicone, fluorine elastomer, EPDM and TPE rubber - Quick drying for quick work - Contains hardening accelerator - Easy surface treatment and easy installation - California Compliant ## Technical Specifications | Specification | Value | |---------------|-------| | 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 | ## Product Details - **Brand:** スリーエム(3M) - **Specific Uses For Product:** Repair - **Material:** Silicone - **Item Form:** Paste - **Special Feature:** Improves adhesion to flexible elastomers and contains hardening accelerator ## Images ![3M Scotch-Weld AC79 Clear Instant Adhesive Primer, 2 fl oz Bottle - Image 1](https://m.media-amazon.com/images/I/619rBEPCyhL.jpg) ## Questions & Answers **Q: What are the ingredients?** A: It is a mixture of acetone and C.A.S 67-64-1 (which is ch3coch3) **Q: How is this applied? Does it come with an applicator of some sort?** A: The cap has a small brush attached to it ## Customer Reviews ### ⭐⭐⭐⭐⭐ Holy smokes! Works like nothing I have ever used before! *by on Reviewed in the United States April 2, 2024* 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 ### ⭐⭐⭐⭐⭐ 3M clobbered it! *by on Reviewed in the United States February 16, 2026* 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! ### ⭐⭐⭐⭐⭐ Makes crazy good bonds, fixes nearly everything *by on Reviewed in the United States February 16, 2026* 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. ## Frequently Bought Together - 3M Scotch-Weld Instant Adhesive Primer AC79, Clear, 2 fl oz Bottle - 3M Scotch-Weld Plastic & Rubber Instant Adhesive PR40, Clear, 20 Gram Bottle - 3M Scotch-Weld Plastic & Rubber Instant Adhesive PR1500, Clear, 20 Gram Bottle --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/744700643-3m-scotch-weld-ac79-clear-instant-adhesive-primer-2-fl](https://www.desertcart.sk/products/744700643-3m-scotch-weld-ac79-clear-instant-adhesive-primer-2-fl) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-06-12*