This specialized soap is intended for preparation of Bathtub's that are going to be refinished or reglazed. This product shold not be left to stand on any surface that is not intended for Refinishing as it will ruin the finish. Please wear proper safety equipment when handling this product, such as eye protection, screen protection, and respiratory protection to ensure safety while using this product. This product contains acids and can harm the skin. Avoid contact with eyes keep out of the reach of children and dispose of properly in accordance with your local and state laws.