---
product_id: 742970715
title: "3M 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"
brand: "3m"
price: "A$191"
currency: AUD
in_stock: true
reviews_count: 5
category: "3 M"
url: https://www.desertcart.com.au/products/742970715-3m-scotch-weld-epoxy-adhesive-dp420-black-two-part-epoxy
store_origin: AU
region: Australia
---

# 20 min work-life for precise adjustments High shear strength for lasting bonds Withstands paint bake up to 400°F 3M 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

**Brand:** 3m
**Price:** A$191
**Availability:** ✅ In Stock

## Summary

> 🔧 Bond like a boss — strength that sticks through every challenge!

## Quick Answers

- **What is this?** 3M 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 by 3m
- **How much does it cost?** A$191 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/742970715-3m-scotch-weld-epoxy-adhesive-dp420-black-two-part-epoxy)

## 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

- • **Unrivaled Bond Strength:** Replaces screws & rivets with a tough, rigid epoxy that holds under high static loads.
- • **Fast Handling & Full Cure:** Reach handling strength in 2 hours and full cure in 24 hours at room temp—speed up with heat for urgent jobs.
- • **Impact & Fatigue Resistant:** Engineered to endure daily abuse and demanding industrial applications without failure.
- • **Optimized Work-Life Window:** 20 minutes of workable time lets you perfect alignment before curing begins.
- • **Versatile Substrate Compatibility:** Bonds metals, ceramics, glass, composites & plastics—one adhesive for all your projects.

## Overview

3M Scotch-Weld Epoxy Adhesive DP420 is a professional-grade, two-part structural epoxy designed for high-impact, fatigue-resistant bonding across metals, ceramics, glass, composites, and plastics. With a 20-minute work-life and rapid handling strength, it replaces mechanical fasteners in demanding industrial and transportation applications, maintaining bond integrity even under heat exposure up to 400°F.

## Description

3MScotch-WeldEpoxy Adhesive DP420 is a toughened, two-part epoxy structural adhesive that provides high impact and fatigue resistance to meet demanding bonding challenges. It works well on a variety of substrates, such as metals, ceramics, glass, many composites and plastics. This adhesive can replace mechanical fasteners, screws, rivets and spot welds in many applications. It can be used in joining, gluing, potting, panel bonding and structural bonding in sporting goods, metalworking, general industrial and transportation segments. The mix ratio is 2:1 and provides 20 minutes of work-life, allowing time to adjust for the desired fit prior to curing. This adhesive reaches handling strength in approximately two hours and is fully cured in 24 hours at 72 F (22 C). It maintains bond strength and can withstand paint bake operations up to 400 F for 60 minutes. When using this, or other Duo-Pak (DP) size adhesives, rely on 3M Applicators for convenient and accurate metering, mixing and dispensing.

Review: 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.
Review: 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?

## Features

- BONDS A VARIETY OF SUBSTRATES: Bonds metals, ceramics, glass, many composites and plastics
- MULTIPLE APPLICATIONS AND INDUSTRIES: Can be used in joining, gluing, potting, panel bonding and structural bonding in sporting goods, metalworking, general industrial and transportation segments
- TWO-PART, RIGID EPOXY: High static load holding and high shear strength helps ensure lasting bonds
- FOR THE MOST CHALLENGING APPLICATIONS: Toughened for impact and fatigue resistance
- For industrial/occupational use only. Not for consumer sale or use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FQQGP96 |
| Best Sellers Rank | #56,644 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #74 in Universal Adhesives |
| Item model number | 62277814364 |
| Manufacturer | 3M |
| Product Dimensions | 25.4 x 10.16 x 5.08 cm; 68 g |

## Product Details

- **Brand:** 3M
- **Item form:** Liquid
- **Material:** Epoxy Resin
- **Special features:** Toughened
- **Specific uses for product:** General Industrial, Metalworking

## Images

![3M 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 - Image 1](https://m.media-amazon.com/images/I/61F2+Kxd1+L.jpg)
![3M 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 - Image 2](https://m.media-amazon.com/images/I/71ESCNpb7lL.jpg)
![3M 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 - Image 3](https://m.media-amazon.com/images/I/71SoTfelnqL.jpg)
![3M 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 - Image 4](https://m.media-amazon.com/images/I/7137l4nOBIL.jpg)
![3M 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 - Image 5](https://m.media-amazon.com/images/I/81UrY55aFNL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by T***S on 4 November 2025*

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.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 21 October 2023*

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?

### ⭐⭐⭐⭐⭐ Review
*by T***M on 13 January 2026*

Use With 3D Objects Toughened for impact Resistance.

## Frequently Bought Together

- 3M 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
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- CNBTR Dispenser for 50ml 1: 1/1: 2 AB Cartridges Plastic Tubes Adhesive Impression Mixing Dispensing

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-14*