There are two components that make up epoxy resin, the first part is the actual epoxy resin and the second part is the hardener agent. Using specific blends of resin and hardener allows you to add distinct properties to the final product, whether that property is aesthetic in nature or pragmatic.
One of the key properties of epoxy resin that makes it so effective for DIY projects and simple to apply is the rate at which it cures, depending on the nature of the project the resin can be cured within as little as four hours.