3M™ Scotch-Weld™ Plus II Applicator W 2:1 and 1:1 Plunger is a self-contained metering, mixing and dispensing machine that simultaneously meters and mixes two-part adhesives as the material is applied.3M Scotch-Weld Plus II Applicator W 2:1 and 1:1 Plunger simultaneously meters and mixes two-part adhesives as the material is applied.