Preventive and sealing liquid latex. Specially created for TNT tires, UST Tubeless for extra protection and for folding tyres. It is inserted into the tire before closing the sidewall with the rim and a film is created on the inner face of the tire, sealing the porosities and the sidewall once inflated. It thus converts the tires into totally watertight surfaces and protected against possible punctures. It is the latex preferred by those demanding weight who use tubed folding tires.