The X-tar Seal Murphys Mounting Demounting Compound - 40 lbs are designed to help with mounting and demounting tires. It is made from natural renewable resources and contains no phosphorus, petroleum, chlorine or zinc, making it safe for use in a variety of applications. This compound also provides moderate rust inhibition, making it ideal for use in wet or humid environments. With this product, you can be sure that you have enough compound to get the job done. It is the perfect choice for any tire mounting and demounting job. FleetPride is your First Click in Heavy Duty®.