Features and Benefits: Two part opexy used to bond steel aluminum SMC and FRP (traditional fiberglass) Primary use is to replace quarter panels roofs box sides van sides utility vehicle sides and door skins Cures on demand with addition of heat Glass beads work as built in spacers for optimum bond line thickness Two-part epoxy 3M 8115 Automix Panel Bond Adhesive is a two-part epoxy based panel bond adhesive used to bond steel aluminum SMC and FRP (traditional fiberglass). 3M Panel Bond Adhesive is specially formulated to replace quarter panels roofs bedsides van body sides utility vehicle sides and door skins. .