Abstract: An improved tire liner composed of high temperature and pressure (HPT) molded and vulcanized rubber with a cross-section having two opposite long sides and two opposite short sides is described. One long side of the liner to be positioned across the U-shaped surface of the tire casing or the inside air space of the casing is beveled along its edges so that it tapers into the short sides. In some instances both long sides are tapered along the edges into the short sides. The tire liner reduces flat tires caused by punctures through the tire casing.

Abstract: An improved annular shaped tire liner which is adapted to fit inside of, around and in contact with a casing of a pneumatic tire and in compression by the casing and a method for preparing the tire liner is described. The liner has a thickness which provides substantial protection against penetration of the tire to the inside of the casing. The tire liner is characterized by having a section which is an annular strip of high pressure and temperature vulcanized and molded rubber, preferably of the type used for bonding to the outside of a tire casing as a tread, with ends joined by a thin section of low temperature and pressure vulcanized rubber. The low temperature and pressure vulcanized rubber is preferably derived from a vulcanizable rubber used to bond the molded rubber to a tire casing and is sometimes referred to as "cushion rubber".