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.