3M Scotch-Weld Epoxy Adhesive DP420LH is an off-white, toughened, two-part epoxy structural adhesive that provides good strength along with high impact and fatigue resistance to meet demanding bonding challenges. 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
3M Scotch-Weld Epoxy Adhesive DP420LH maintains bond strength at high and low temperatures and can withstand paint bake operations up to 200C 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 72F/22C.) 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 has applied our expertise to meet and exceed the demands of even the toughest applications.