Lead fluxing made easy. No more using rosin, parraffin, tallow, bullet lube, and other homemade concoctions. CleanCast is non-smoking, odor-free, and it really works. Only a small amount is necessary to prepare even a 20 pound lead pot for bullet production. Separates dross from your valuable bullet alloy and improves the consistency of the melted lead to eliminate variability during your casting session.