What are the safety concerns and best practices for handling and disposing of epoxy and polyurethane resins?

Handling resins requires strict adherence to safety protocols because these chemicals can cause skin irritation or respiratory issues if handled improperly. It is essential to work in a well-ventilated area and wear appropriate personal protective equipment, including gloves, safety goggles, and respiratory masks when necessary. For disposal, liquid resin and hardener must never be poured down the drain as they are hazardous to the environment and water systems. Best practice involves mixing leftover components to cure them into a solid, inert state before disposal according to local chemical waste regulations. Furthermore, many high-quality polyurethanes are now formulated to be mercury-free to minimise toxic risks during the manufacturing process.