3M™ Scotch-Weld™ Epoxy Adhesive DP420LH

3M™ Scotch-Weld™ Epoxy Adhesive DP420LH is a two-part toughened epoxy adhesive built on the proven performance of the DP420 platform. It’s formulated to meet the applicable IEC 61249-2-21 low-halogen standard while maintaining the platform’s established bond strength and reliability. 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.

Engineered for industrial assembly, 3M™ Scotch-Weld™ Epoxy Adhesive DP420LH provides a reliable structural bond on metals and composites. It can also be heated to accelerate cure, providing flexibility for variable curing workflows. Once fully cured in 24 hours at room temperature — 23 °C — it delivers a structural bond that may be suitable to replace screws, rivets, mechanical fasteners, and spot welds on most applications, helping simplify assembly, reduce weight, and improve stress distribution across the bond line. Common uses include circuit board assembly, and consumer electronics. It is available in bulk and in Duo-Pak cartridges in 50 ml, 200 ml, and 400 ml. It is compatible with the 3M™ EPX Applicator System for accurate metering, mixing, and dispensing. Backed by decades of 3M adhesive innovation, 3M™ Scotch-Weld™ Epoxy Adhesive DP420LH gives manufacturers a single solution that pairs structural-grade bond strength with the low halogen chemistry that today’s electronics and high-reliability applications demand.