To make life easy for themselves, the Brazilians raced to a 3-0 lead inside the first 18 minutes.
It started with Lucas Ribeiro Costa firing from an indirect free-kick just six minutes into the match for his 14th Premier Soccer League goal of the season.
Ribeiro then set up Iqraam Rayners, who easily finished on 12 minutes before Arthur Sales' shot from just inside the box was deflected into the net by Thabo Moloisane in the 18th minute.
The 3-0 win saw Masandawana extend their PSL lead to 15 points ahead of second-placed Orlando Pirates and they now just need a point from two league games to be crowned this season's champions.
On the other hand, Stellenbosch remain fourth with 23 points fewer than Sundowns.