noun
- a substance added to another material to make it harder or more durable
- a chemical agent that causes a resin or coating to cure and solidify
Usage: technical
Examples
- Mix the epoxy resin with the hardener according to the package directions.
- The concrete hardener made the surface more resistant to wear.
- Without the proper hardener, the paint won’t dry correctly.
- She added a nail hardener to strengthen her brittle nails.
- The two-part adhesive requires both the base and the hardener.
- Apply the hardener evenly across the entire floor surface.