21-year-old Arismandi, a regular in the Uruguay national side, has flown in for talks and a deal is set to be completed before Tuesday's deadline as manager Tony Pulis looks to add quality to his squad.
A fee, including add on's, of £5m has been agreed and it is believed that personal terms won't be a stumbling block meaning that, once a work permit is obtained the man known as 'The Destroyer' can get his Potters career underway.
The highly rated star is most comfortable and effective as a defensive midfielder, but can also play as a centre back.