Low Free TDI Trimer Based Hardener for Automotive Refinish Two-Component Clearcoats: A Comprehensive Overview Abstract: Automotive refinish clearcoats are crucial for providing durable protection and aesthetic appeal to vehicles. Two-component (2K) clearcoat systems, typically comprising a polyol resin and a polyisocyanate hardener, are widely employed in this application. Traditional isocyanate hardeners often contain significant levels...