This synthetic mold talc from Rio is safe to use on the entire mold—no longer will stray particles of talc cause pitting and other damage to your patterns. It will keep the vents in your mold open, allowing air to escape so that air-bubble defects are virtually eliminated and your pattern fill is significantly increased. Use this talc also for powder mold separations; it will keep rubber layers from vulcanizing together. The talc contains no oils or perfumes to clog or deteriorate your mold. The shaker jar makes the talc quick and easy to apply.