Modified tire sealant mixing device

A method of making a tire sealant composition, comprising the steps of:

• adding components comprising an elastomer and curatives to a low pressure feeding area of a dumping extruder, the dump extruder equipped with conical converging twin screws located in a batching chamber, said chamber having the low pressure feeding area and a high pressure ducted area, a removable blind sealing flange for temporarily sealing an outlet of said batching chamber so that the added components are forced to recirculate between the high pressure ducted area and the feeding area within the batching chamber, the batching chamber thereby also acting as a compounding chamber;
• and
• adding a pressurized liquid diluent via an inlet port located in the high pressure ducted area;
• mixing the liquid diluent and the added components in the batching chamber to form the sealant composition.