Positive Heat Indicator When Heat Treating
Laboratory control, minimum cost. For furnace or open flame hardening and tempering of steel parts. Apply thin smear to surface to be treated. When desired temperature is reached, Tempilaq melts sharply. Disregard color changes, when Templiaq melts, quench!
Big Book Catalog, Issue:73, Page:397
SPECS: 2 fl. oz. (59 ml) in brush top bottle.