If you're looking to protect your concrete or metal surfaces from damage, an epoxy sealer can be a great option. The first thing to consider is the type of surface you'll be applying the epoxy sealer to. An epoxy concrete sealer is designed specifically for concrete surfaces, while epoxy for metal is formulated for metal surfaces. ITW Performance Polymers is a prominent name when looking for the finest metal epoxy putty, metal epoxy adhesive, concrete epoxy adhesives, and more.