The word epoxy

often is used erroneously to mean any resin applied to repair wood— even when the resin is not epoxy. People confuse many adhesive, bonding, and filling products with epoxies. They include five-minute adhesives, bar-top coatings, and paints. Moreover, don’t assume that a product with two parts is an epoxy. Repair products including common auto-body filler get caught up in the confusion. (Bondo is the familiar product from 3M.) Most are polyester resins that cure with the addition of a catalyst rather than a hardener; they are formulated for sheet metal, not wood.