PREMA PUS-3 Universal square vulcanizing tire repair patches are non-directional tire repair units suitable for placement in the tread area of tires and can be safely used in both bias and radial constructed tires. PREMA universal tire repair patches can be used as car tire patches, truck tire patches, farm tire patches, commercial tire patches, tractor tire patches, atv tire patches, lawn mower tire patches and more! For best results, use with PREMA PFC-8 or PFC-32 ultra fast drying vulcanizing cement and always fill the injury channel with the appropriate PREMA Stem repair material, PCS-2, PCS-3 or PCS-4, for a complete and permanent tire repair.