Transtar 6721 Medium Urethane Grade Reducer (1 Gallon) is designed for use with Transtar primers and clearcoats as well as with nearly all brands of urethane primers, topcoats, and clears. Suitable for overall refinishing, spot and panel refinishing, and to assist in producing a brilliant, clear finish with high gloss and superior leveling. Alcohol free. 99.96% water free. Temperature: 75° – 90°F (24° - 32° C). 1 Gallon. TDS 600. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.