JPWheelSupplies guarantees any new seal on either resealed or newly rebuilt wheels to be free of any defects resulting in an air leak. (This guarantee does not apply to valve stems, if you have an air leak please check your valve stems first). Under the condition of any sort of leak, we will help you determine the source. If the source is determined to be a defective seal, JPWheelSupplies will reseal the leaking wheel free of charge. JPWheelSupplies is not responsible for any related fees such as tire mounting/dismounting, balancing, transportation, or shipping wheels for reseal. The buyer assumes the previously stated expenses. A damaged seal due to negligence in tire mounting will void this guarantee, this guarantee only applies to newly built wheels and newly resealed wheels. If you have mounted tires multiple times and the seal eventually starts to leak, the warranty may be voided due to wear and tear.