What Is Epoxy Adhesive?
The best-known and most widely used form of epoxy around the house is adhesive. And if you haven’t used epoxy for gluing stuff, you should try it. Epoxy is the true “super” glue. While regular superglue (cyanoacrylate) is finicky and won’t hold unless you have perfectly matched parts with virtually no gap whatsoever, epoxy can span sizeable spaces to fuse parts together, forming a tie that’s often stronger than the host material(s). It also sticks to plastic, metal, wood, ceramic, concrete, brick—you name it.
Only polyurethane glue comes close to epoxy considering materials it will bond to. But polyurethane is most useful as a super-strong wood glue. Epoxy can be sanded, filed, drilled into and even tapped to hold screws. You can’t do that with any other off-the-shelf glue.