amount of additional weight added to the tire 2 this enables the compartmentalized sealant strip barrier assembly 10 to be manufactured in a cost efficient manner in regards to its overall material usage with reference to fig3 b a second embodiment of the tire is shown where additional sealant strips 11 are employed in this embodiment the axially outer sealant strip zones 20 and 22 are illustrated with seven intermediate strip zones 21 provided while this number can vary for each tire 2 it is sufficient to note that all of these can be assembled in a simple one step co extrusion process that is described hereafter the illustrated compartmentalized sealant strip and barrier assembly 10 is best manufactured by a dual co extrusion process this co extrusion process requires a unique die 30 to be provided this die 30 is best illustrated in fig4 7 with reference to fig4 a perspective view of the die 30 is shown a pair of lateral die ends 31 32 are shown in between the die ends 31 32 is an upper surface 33 this upper surface 33 forms the barrier layer 9 profile as shown this barrier layer profile also forms the pair of lateral edges 9 a and 9 b which are formed in depressions 34 35 in the die these depressions 34 35 can step up to the flat surface 33 extending between the lateral depressions 34 35 these features combined form the profile for overall barrier layer 9 in the die 30 at an outlet portion of the die 30 downstream the barrier material will pass over a.