Composition: Co Al Si References: Can be used as a body stain. Maximum temperature 2300 F. May be used with our without Zinc. Mason Stains Home Page 6363 Sky Blue - 1/4 pound 6363-14$3.31 Sky Blue - 1/2 pound 6363-12$6.20 Sky Blue - 1 pound 6363-1$11.54 Sky Blue - 5 pounds 6363-5$53.45