The Acme Finish 1 FH612 Medium Universal Hardener is a quart-sized paint catalyst produced by Sherwin-Williams. This hardener has a medium speed and is designed to work with a variety of automotive paints. It is VOC compliant and includes warnings about GHS and OSHA hazards. This product is essential for achieving a durable finish on automotive surfaces, making it an essential tool for auto enthusiasts and professionals alike.