Composition: CR Fe Zn Al References: Maximum Temperature 2300 F. May be used with our without Zinc. Zinc not necessary but better with. Mason Stains Home Page 6163 Terracotta - 1/4 pound 6163-14$3.16 Terracotta - 1/2 pound 6163-12$5.91 Terracotta - 1 pound 6163-1$11.00 Terracotta - 5 pounds 6163-5$50.95