ProBreaks down calluses in just 3-5 minutes, then simply file or buff them away! It does the work for you and saves you time. Directions: After soaking, liberally spread Callus Eliminator over callus. Let it set for 3-5 minutes depending on callus buildup. Then wipe away excess and use a file or buffer to gently remove callus. Wash off with water. Wear gloves or rinse fingers after applying.