BJK Murphys Concentrated Paste, 8lb Pail-by-BLACK JACK TIRE REPAIR (1) New This premium quality product is a superior tire Mounting and Rubber Lubricant which is essential in the mounting and removal of tires. BlackJack Tire Mounting Paste will protect against bead damage and helps to form a seal between the rim and bead of the tire to prevent leaks in tubeless tires. BlackJack special rust inhibited formulation protects against rust and oxidation under the most severe conditions. Mix ratio 4 parts water to 1 part paste.