What is a Metal Epoxy?

Karize Uy
Karize Uy
Man with a drill
Man with a drill

Metal epoxy is a special type of adhesive most useful for binding metals. It is made of a thermosetting polymer, a variety of plastic that hardens when mixed together. This adhesive not only binds metals, but also other materials such as plastic and wood.

Usually, metal epoxy is sold in two separate containers, one for the “resin," the other for the “hardener.” The resin is what makes the epoxy viscous and gummy, while the hardener helps solidify it. The two components must be mixed together before the epoxy can become an effective adhesive. Many repairmen recommend a period of two to three minutes to allow the mixture to harden a little before molding and applying it on the metal surface. Once the adhesive is smeared on the metal, it can take an average of another ten minutes to harden and bind the broken surfaces.

One prime advantage of using metal epoxy is its strength. The combination of the resin and hardener, a process called curing, is irreversible, which means epoxy is generally resistant to heat and moisture. Its strength makes it useful as a mechanical and engineering adhesive, especially when applied to heat-susceptible machines such as generators and aircraft. It is also very resistant to other chemicals like gas, oil, and other acidic liquids.

Metal epoxy is also an effective adhesive for water-exposed objects, such as drainage pipes and water tanks. Many epoxies today are manufactured to set even when underwater, which makes it useful for repairing boats, surfboards, and other watercraft. Aside from being a structural adhesive, this type of epoxy can also act as a filler. Over time, metal objects can acquire some holes due to rust and corrosion. Applying and filling the holes with metal epoxy can prevent further destruction.

Aside from being an adhesive and filler, metal epoxy can be used in several ways. Many electronics manufacturers use the epoxy as insulators within their circuit systems to prevent short-circuits. Other industries apply the polymer as a replacement for metal moldings and castings, making for a more economical production cost.

Metal epoxy can even be used as a surface coating for floors. Garages and workshops tend to have damaged and discolored floors due to the heavy-duty activities happening in the rooms. Applying an epoxy coating makes floors last longer and reduces the likelihood of painting and repainting the floors in the future. Homeowners can even choose from the selection of colors for the epoxy coating.

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