We have received your request and will respond within 2-3 business days. 3M offers a limited liability manufacturer warranty that the product shall conform to 3M's published specifications, and that 3M shall repair or replace at its cost all goods that are found to be defective at the time of purchase. This warranty does not cover defects arising out of usage wear and tear. All warranty claims should be made within one month of the purchase supported by an invoice / bill.