Lead fluxing made easy. No more using rosin, paraffin, 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 lb lead pot for bullet production. Separates dross from valuable bullet alloy and improves the consistency of the melted lead to eliminate variability during your casting session.