LEC Shocking SHOCK Bathtub Stain-Resistant Coating Keeps your bathtub clean for 180 days This is a new, unopened item, but please understand that it has been stored at home. Thank you for your purchase. Lasts for approximately 6 months with a single coating! Keeps clean for about 6 months. The coating film repels dirt, making it difficult for dirt to adhere, and even if it does, it's easy to remove, making everyday cleaning easier. It also has the effect of preventing slipping in the bathtub.