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3M™ Scotch-Weld™ Epoxy Adhesive DP420

3M Product Number  420     
3M™ Scotch-Weld™ Epoxy Adhesive DP420 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 DP420 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
  • 20 minute work life provides time for positioning and adjustment
  • Adhesive cures at room temperature, making it a convenient and easy to use solution for challenging applications
  • Reaches high strength quickly with heat cure
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13 Results (Displaying results 1-13)
3M IDUPCMarketplace Formal NameColor
62338085301000212008223913M™ Scotch-Weld™ Epoxy Adhesive 420 Off-White Part A, 5 Gallon, 1 per caseOff-White
62277895306000212004153333M™ Scotch-Weld™ Epoxy Adhesive 420 Black Part B, 55 Gallon Open Head Drum, 1 per caseBlack
62277835302000212004152963M™ Scotch-Weld™ Epoxy Adhesive DP420 Black, 400 mL, 6 per caseBlack
62287895304000212004153403M™ Scotch-Weld™ Epoxy Adhesive 420 Black Part A, 55 Gallon, 1 per caseBlack
62277814356000212004152893M™ Scotch-Weld™ Epoxy Adhesive DP420 Black, 37 mL, 12 per caseBlack
62277838306000212004153023M™ Scotch-Weld™ Epoxy Adhesive DP420 Black, 200 mL, 12 per caseBlack
62277885307000212004153193M™ Scotch-Weld™ Epoxy Adhesive 420 Black Part B, 5 Gallon, 1 per caseBlack
62328014352000212008223603M™ Scotch-Weld™ Epoxy Adhesive DP420 Off-White, 37 mL, 12 per caseOff-White
62287885305000212004153263M™ Scotch-Weld™ Epoxy Adhesive 420 Black Part A, 5 Gallon, 1 per caseBlack
62328035308000212008783363M™ Scotch-Weld™ Epoxy Adhesive DP420 Off-White, 400 mL, 6 per caseOff-White
62328038302000212008783293M™ Scotch-Weld™ Epoxy Adhesive DP420 Off-White, 200 mL, 12 per caseOff-White
62328085303000212008223843M™ Scotch-Weld™ Epoxy Adhesive 420 Off-White Part B, 5 Gallon, 1 per caseOff-White
62277875308000511152579643M™ Scotch-Weld™ Epoxy Adhesive 420 B/A Black, Gallon Kit, 1 per caseBlack
13 Results (Displaying results 1-13)


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

3M™ Scotch-Weld™ Epoxy Adhesive DP420
Bonds stainless steel shaft into stainless steel club head
High Peel and Shear Strength Maintains Lasting Bond at High and Low Temperatures
3M™ Scotch-Weld™ Epoxy Adhesive DP420 maintains bond strength at high and low temperatures and can withstand paint bake operations up to 400°F for 60 minutes. It works well on a variety of substrates such as metals, ceramics, wood, glass, many composites and plastics, and is an excellent indoor bonding agent for joining, gluing, potting, panel bonding, and structural bonding. 3M™ Scotch-Weld™ Epoxy Adhesive DP420 Off-White meets the requirements for UL 94 HB.

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 DP420 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 DP420 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 applies their expertise to meet and exceed 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.


 Adhesion Strength‎‎ 1200 oz/in,‎ 1120 oz/in
 Adhesive Type‎‎ Epoxy
 Applications‎‎ Hard Disk Drive Component Assembly,‎ Bonding,‎ Potting
 Brand‎‎ Scotch-Weld
 Color‎‎ Black,‎ Off-White
 Consumer Label‎‎ No
 Flame Retardant‎‎ UL94 HB
 Full Cure‎‎ 24 Hours @ 72 F (22 C)
 Hardness‎‎ 75-80 Shore D
 Industries‎‎ Transportation,‎ Specialty Vehicle,‎ Construction,‎ Military & Government,‎ General Industrial,‎ Electronics,‎ Consumer Goods
 Mix Ratio Volume Base:Accelerator‎‎ 2 : 1
 Open Time‎‎ 20 minutes @ 72 F (22 C)
 Physical Form‎‎ Flowable Liquid
 Product Form‎‎ Kit,‎ Gallon,‎ Each
 Product Type‎‎ Epoxy Adhesive
 Set Time‎‎ 2 Hour
 Shear Strength at 72 Degrees F (22 Degrees C)‎‎ 4500 Pound-Force Per Square Inch
 Shelf Life in Months (from date of manufacture)‎‎ 24,‎ 15
 Specific Gravity‎‎ 1.14,‎ 1.13,‎ 1.1
 Storage Temperature‎‎ 72 Degree Fahrenheit
 Substrate 1‎‎ Metal,‎ Glass & Ceramics
 Substrate 2‎‎ Metal,‎ Glass & Ceramics
 Substrates‎‎ Metal,‎ Glass & Ceramics
 Viscosity Range (cps) at Room Temperature‎‎ 30,000,‎ 20,000-50,000,‎ 8,000-14,000
 Volume‎‎ 5 gal,‎ 1 gal,‎ 55 gal
 Volume (metric)‎‎ 200 ml,‎ 37 ml,‎ 400 ml