System Three General Purpose Epoxy Hardener , 1 Pint is a fast-drying hardener designed for use with System Three General Purpose Resin. It cures quickly, typically within about 15 minutes, even at temperatures as low as 35 degrees Fahrenheit. At 77 degrees Fahrenheit, it becomes tack- in just 2 hours, making it efficient for various applications. This hardener is combined with resin in a ratio of 2 parts resin to 1 part hardener, ensuring optimal performance. Proudly made in the USA. Model Number: