---
product_id: 47209036
title: "3M Scotch-Weld Instant Adhesive Primer AC79, Clear, 2 fl oz Bottle"
brand: "3m"
price: "KD 12.28"
currency: KWD
in_stock: true
reviews_count: 8
category: "3 M"
url: https://www.desertcart.com.kw/products/47209036-3m-scotch-weld-instant-adhesive-primer-ac79-clear-2-fl
store_origin: KW
region: Kuwait
---

# Fast drying for rapid workflow Optimizes adhesion on tough elastomers Contains cure accelerator for stronger bonds 3M Scotch-Weld Instant Adhesive Primer AC79, Clear, 2 fl oz Bottle

**Brand:** 3m
**Price:** KD 12.28
**Availability:** ✅ In Stock

## Summary

> 🔗 Stick with the best — bond smarter, not harder!

## Quick Answers

- **What is this?** 3M Scotch-Weld Instant Adhesive Primer AC79, Clear, 2 fl oz Bottle by 3m
- **How much does it cost?** KD 12.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/47209036-3m-scotch-weld-instant-adhesive-primer-ac79-clear-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:** Enhances adhesion on challenging materials like silicone, EPDM, and TPE.
- • **One-Shot Success:** Ultra-thin primer wicks into gaps for flawless, lasting bonds.
- • **Speed Meets Precision:** Fast-drying formula keeps your projects moving without delay.
- • **California Compliant Confidence:** Eco-conscious formulation that meets strict regulatory standards.
- • **Industrial Strength, DIY Friendly:** Trusted by professionals for heavy-duty repairs, now accessible for your shop.

## Overview

3M Scotch-Weld Instant Adhesive Primer AC79 is a clear, fast-drying primer designed to dramatically improve adhesion on flexible elastomers such as silicone, fluoroelastomers, EPDM, and TPE. Featuring a cure accelerator and ultra-thin consistency, it ensures strong, durable bonds even on notoriously difficult surfaces like POM and stainless steel. Ideal for professional-grade repairs and compliant with California environmental standards, this 2 fl oz bottle is a must-have for anyone demanding reliable, high-performance adhesive results.

## Description

3M Scotch-Weld Instant Adhesive Primer AC79 is designed for use on difficult-to-bond low surface energy elastomers, such as EPDM, silicone and other rubbers. Surface preparation and application are straightforward and the adhesive primer is fast drying to keep jobs moving quickly.

Review: 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
Review: 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!

## Features

- Improves adhesion on flexible elastomers, including rubbers, such as silicone, fluoroelastomers, EPDM and TPE
- Fast drying to keep jobs moving quickly
- Contains cure accelerator
- Straightforward surface preparation and easy application
- California compliant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071W9H889 |
| Best Sellers Rank | #80,650 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Adhesive Primers |
| Brand | 3M |
| Color | Clear |
| Date First Available | June 1, 2017 |
| Global Trade Identification Number | 00051115313882 |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Volume | 2 Fluid Ounces |
| Item Weight | 2.08 ounces |
| Item model number | AC79 |
| Manufacturer | 3M |
| Material | Silicone |
| Package Information | Bottle |
| Product Dimensions | 10 x 11 x 2 inches |
| Special Feature | Improves Adhesion on Flexible Elastomers, Contains Cure Accelerator |
| Specific Uses For Product | Repair |
| UPC | 051115313882 |
| Unit Count | 2.0 Fluid Ounces |
| Viscosity | Low to Medium |
| Viscosity Level | Low to Medium |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** 3M
- **Item Form:** Paste
- **Material:** Silicone
- **Special Feature:** Improves Adhesion on Flexible Elastomers, Contains Cure Accelerator
- **Specific Uses For Product:** Repair

## Images

![3M Scotch-Weld Instant Adhesive Primer AC79, Clear, 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 R***R on 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

### ⭐⭐⭐⭐⭐ Really Sticks
*by E***E on December 15, 2023*

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!

### ⭐⭐⭐⭐ It's plain old acetone!
*by G***Y on July 29, 2025*

It's plain acetone. Don't waste your money! It does have a cute little brush attachment tho.

## 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

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-01-24*