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SKU 7100148729
Legacy SKU 62281814368
UPC 00638060089729
Catalog Number 420LH
Product Number 420LH

3M Scotch-Weld Epoxy Adhesive DP420LH is a toughened, two-part epoxy structural adhesive that provides good strength along with high impact and fatigue resistance to meet demanding bonding challenges. 3M Scotch-Weld Epoxy Adhesive DP420LH can replace mechanical fasteners, screws, rivets and spot welds in many applications.

  • High peel and shear strength maintains lasting bond at high and low temperatures
  • Toughened for impact and fatigue resistance
  • Low Halogen
  • Try the new 3M™ Scotch-Weld™ Digital Dispensing Assistant and experience shorter machine setup time with a free new automation tool for time-pressure systems
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On it's way to you April 8   

Qty

Minimum Order 12 Items
Order Increment 12 Items
  Multiple Application Use
  Versatile Across Industries
  Global Shipping
  Fantastic Price
Product Dimensions
Imperial Metric
Shipping Dimensions
Weight 1.756 lb
Length 6 in
Width 4.625 in
Height 5.5 in
Color Off-white

PRODUCT FAQ

  1. What is the shelf life of 3M™ Scotch-Weld™ Epoxy Adhesive DP420LH Off-White, 50 mL Duo-Pak?

    The shelf life for this product is two years from the date of manufacture when stored at room temperature.

  2. Can I use this adhesive on plastic surfaces?

    Yes, it can bond to a wide range of materials including plastics, metals, and composites. However, we recommend testing before use to ensure compatibility with your specific application.

  3. Is this adhesive heat resistant?

    Yes, it has excellent resistance to high temperatures up to 120°C (248°F) for long-term exposure and up to 140°C (284°F) for shorter periods.

  4. How long does it take for the adhesive to cure completely?

    The handling strength of the epoxy adhesive occurs in approximately four hours at room temperature. Full cure is achieved in about seven days at room temperature or can be accelerated by applying heat.

  5. Are there any safety precautions required when using this product?

    As with all chemicals, proper safety precautions should be observed when handling and using this product. Please refer to the material safety data sheet (MSDS) for information on how best to handle it.

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.
3M™ Scotch-Weld™ Epoxy Adhesive DP420LH

When using a Duo-Pak (DP) size adhesive, rely on 3M dispensing equipment for convenient and accurate metering, mixing and dispensing.

High Peel and Shear Strength Maintains Lasting Bond at High and Low Temperatures

3M™ Scotch-Weld™ Epoxy Adhesive DP420LH maintains bond strength at high and low temperatures and can withstand paint bake operations up to 400°F for 60 minutes. It works well in the electronics industry on a variety of substrates such as anodized aluminum, stainless steel composites and plastics, and is an excellent indoor bonding agent for joining, gluing, potting, panel bonding, and structural bonding. It is classified as low halogen as defined by the Electrotechnical Commission (IEC) 61249-2-21 Standard.

Recommended Applications

  • Small joint assembly
  • Heavy-duty mounting assembly
  • Metalworking
  • Carbon fiber epoxy bonding

20 Minute Work Life Provides Time for Positioning and Adjustment

3M™ Scotch-Weld™ Epoxy Adhesive DP420LH dispenses as a medium viscosity adhesive for easy, controlled application. The adhesive reaches handling strength in approximately two hours and is fully cured in 24 hours (at 72°F/22°C.) The mix ratio is 2:1 and provides a 20 minute work life, providing time to adjust for desired fit prior to curing. This adhesive is available in a variety of package sizes and can be dispensed in several ways to meet the demands of the user and the job.

Toughened for Impact and Fatigue Resistance

3M™ Scotch-Weld ™ Epoxy Adhesive DP420LH is appropriate for applications that will face tough environmental challenges. Formulated to provide strong adhesion for the long-term, this resilient epoxy is another way 3M meets and exceeds the demands of even the toughest applications.

What are Epoxy Adhesives?

Epoxy adhesives are part of the class of adhesives called "structural adhesives," which also includes polyurethane, acrylic, cyanoacrylate and others. Epoxies are formulated as liquid reactive polymers that undergo a chemical reaction when mixed and then cure to form a solid plastic material. Once the two parts are mixed in their specified ratio, they begin the curing process and offer a limited work life (open time) where the adhesive can be applied and the two surfaces positioned as needed. This work life lasts anywhere from a few minutes to several hours. These structural adhesives provide high shear and peel strengths, depending on the formula, and better heat and chemical resistance than other common adhesives. In general, epoxy adhesives have the highest overall strength and offer the best performance and most resistance to high temperatures, solvents and outdoor weathering.

Epoxy adhesives are widely used in building and home construction; aircraft and automobile manufacturing; bicycle, boat, golf clubs, ski and snowboard assembly as well as a host of home use and other applications. They are used virtually anywhere high-strength bonds are needed along with resistance to environmental conditions. These adhesives are popular for their ease of use, mechanical strength and chemical resistance. Formulations can be created to make epoxies flexible or rigid, transparent or opaque, quick setting or slow setting. The versatility with which epoxy adhesives can be formulated helps meet almost any requirement for bonding wood, metal, glass, stone and various plastics.

Industrial uses for epoxies range widely and, in addition to adhesives, include coatings and composite materials like carbon fiber and glass-reinforced composites. They are the preferred choice due to their ability to flow and conform to the work area, strong adhesion, chemical and heat resistance and exceptional mechanical and electrical insulating properties.

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