What is the purpose of a hardener in resin application?

The primary purpose of a hardener in resin application is to cause the resin to solidify. When mixed with the resin, the hardener initiates a chemical reaction known as cross-linking, resulting in the hardening of the material. This solidification transforms the resin from a liquid into a durable and rigid form, making it suitable for various applications, such as in coatings, adhesives, and casting.

The process is essential because the correct ratio of resin to hardener ensures the material reaches optimal strength and durability upon curing. Without the hardener, the resin would remain liquid or tacky and would not fulfill its intended functional properties.