Berryman Tire Seal-R stops leaks before they happen. Instantly seals leaks and protects pneumatic tires and tubes from small nails . thorns . and other sharp objects. Stays liquid permanently and uses innovative fiber technology to plug leaks and prevent loss of air pressure. Advanced corrosion inhibitors protect all types of wheels . including steel . chrome . and alloy. Seals porosity leaks in magnesium and aluminum composition wheels. Available in a variety sizes for any job. Nonflammable and biodegradable formula. Great for tractor tire ballasting.