The blue material on new tires is a mold release compound. This compound is applied to the inside of the tire mold before the tire is vulcanized. It helps the tire to release from the mold easily and prevents it from sticking.
The mold release compound is typically made from a mixture of wax, oil, and water. It is applied to the mold using a spray or a brush. The compound is then allowed to dry before the tire is vulcanized.
The mold release compound is necessary to prevent the tire from sticking to the mold. If the tire did stick to the mold, it would be difficult to remove and could be damaged. The mold release compound also helps to protect the mold from damage.
The mold release compound is usually removed from the tire after it has been vulcanized. This can be done by wiping the tire with a solvent or by using a pressure washer.
