3M Scotch-Weld Epoxy Adhesive DP420NS WS Black is a toughened, non-sag, two-part epoxy structural adhesive that provides good strength along with high impact and fatigue resistance to meet demanding bonding challenges. Epoxy Adhesive DP420NS WS Black is made with spacer beads to control bondline thickness and can replace mechanical fasteners, screws, rivets and spot welds in many applications.