A refractory mix developed specifically for glass slumping. Its unique characteristics are: • Renders very fine details when on detailed relief. • Stands up to repeated firings. 40 firings for example, for a simple slump-over mold. • Kiln wash not required for slump-over molds at temperatures below 1400°F (760°C). • Simple to prepare. Mix 50-50 by volume with water, pour and fire. • Finished mold can be reworked with a file, scraper, etc.