3M™ Scotch-Weld™ Epoxy Adhesive 420, Off-White, Part A, 50 Gallon, Drum

$268.88 / US gallon

SKU	7100425206
Legacy SKU	62338095318
UPC	00068060773494
Product Number	DP420

3M Scotch-Weld Epoxy Adhesive DP420 Off-White is a toughened epoxy adhesive designed to combine the proven bond performance of the DP420 base with a light color appearance, while meeting applicable UL 94 HB requirements. Its 2:1 mix ratio formula dispenses as a flowable, off-white adhesive that provides a 20-minute working time window supporting repositioning and realignment for accurate component placement during assembly.

BOND VERSATILITY: Bonds metals and composites, enabling multi-material bonding in demanding production environments
STRUCTURAL STRENGTH: Can replace screws, rivets, mechanical fasteners, and spot welds, supporting lighter assemblies and simplified fabrication
MEETS 94 HB: Meets UL 94 HB standards, helping manufacturers comply with applicable flammability requirements
LIGHT-COLORED EPOXY: Its 2:1 mix ratio formula dispenses as a flowable, off-white adhesive for for industrial applications requiring a light color appearance
WORKING TIME: Provides a 20-minute working time and handling strength in 2 hrs
TOUGHENED DURABILITY: Toughened formula resists impact for a durable bond

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Multiple Application Use

Versatile Across Industries

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Fantastic Price

Product Dimensions	Imperial	Metric
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Shipping Dimensions
Weight	519.38043 lb
Length	23.75 in
Width	23.75 in
Height	34.81181 in

PRODUCT FAQ

What is the shelf life of 3M™ Scotch-Weld™ Epoxy Adhesive 420?

Great question! The shelf life is typically 12 months from the date of manufacture when stored in unopened, original containers at room temperature. We always recommend checking the date code on your drum to ensure you're working with fresh material.
Can I use Scotch-Weld™ Epoxy Adhesive 420 on plastic substrates?

Absolutely! This versatile adhesive bonds well to many materials including metals, composites, and certain plastics. However, I'd recommend testing on your specific plastic first, as some plastics may require surface preparation for optimal adhesion.
How long does it take for the adhesive to cure?

The cure time depends on temperature and your specific application. Typically, you'll see fixture strength in about 24 hours at room temperature, with full cure taking longer. For faster results, elevated temperatures will accelerate the process—I'd be happy to provide specific timing details for your application!

For industrial/occupational use only. Not for consumer sale or use.

3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage. For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.

```html 3M Scotch-Weld Epoxy Adhesive DP420 Off-White

3M Scotch-Weld Epoxy Adhesive DP420 Off-White represents a sophisticated two-part, flowable epoxy formulation engineered to provide exceptional resistance to impact forces. This advanced adhesive system is particularly well-suited for demanding structural bonding applications involving metals and composite materials, where reliability and long-term performance are critical requirements.

Cure Time and Processing Flexibility

This epoxy adhesive achieves functional handling strength in approximately two hours under standard conditions, allowing for efficient workflow management in production environments. The formulation can be accelerated through the application of controlled heat, providing manufacturers with the flexibility to optimize curing schedules based on specific production requirements. Complete chemical cure is typically achieved within 24 hours at ambient room temperature of 73°F (23°C).

Performance Characteristics and Structural Benefits

Upon full curing, 3M Scotch-Weld Epoxy Adhesive DP420 Off-White delivers robust structural bond performance that may effectively replace traditional mechanical fastening methods. This capability can facilitate the elimination of screws, rivets, conventional mechanical fasteners, and spot welds across most industrial applications. The resulting advantages include simplified assembly procedures, overall weight reduction in finished products, and superior stress distribution across the adhesive bond line compared to traditional point fasteners.

Environmental and Chemical Resistance

The toughened epoxy chemistry formulation maintains bond integrity when exposed to challenging environmental conditions, including high humidity environments, temperature fluctuations, petroleum products such as diesel and gasoline, salt water exposure, and freshwater immersion. This broad chemical resistance profile makes the adhesive suitable for applications in demanding marine, automotive, and industrial settings.

Temperature Performance and Paint Process Compatibility

The adhesive is engineered to tolerate elevated heat exposure up to 392°F (200°C) for durations reaching 30 minutes, making it compatible with standard industrial paint bake cycles and thermal processing procedures commonly employed in manufacturing operations.

Typical Applications

Panel bonding and assembly
Composite material fabrication
Potting and encapsulation
Transportation industry bonding
Metalworking applications
Sporting goods manufacturing
General industrial manufacturing

Product Availability and Dispensing Options

3M Scotch-Weld Epoxy Adhesive DP420 Off-White is available in multiple packaging formats, including bulk containers and convenient Duo-Pak cartridges. Standard sizes include 1.69 fluid ounces (50 ml), 6.76 fluid ounces (200 ml), and 14.07 fluid ounces (400 ml) to accommodate varying production volumes and application requirements. The adhesive is fully compatible with the 3M EPX Applicator System, which provides precise metering, thorough mixing, and accurate dispensing capabilities for consistent application results.

Key Advantages for Industrial Manufacturing

For manufacturers operating under strict specifications regarding material color restrictions and flammability compliance, 3M Scotch-Weld Epoxy Adhesive DP420 Off-White delivers exceptional structural bond durability specifically engineered to meet the rigorous demands of sophisticated industrial assembly operations. The off-white color specification and established safety profile make this adhesive an ideal choice for regulated manufacturing environments.

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