The Brazilians dominated the match, with winger Dillon Sheppard in superb form.
Sheppard created the first real chance of the game in the 30th minute when he set up Gift Leremi inside the area, the former Orlando Pirates midfielder hit the crossbar from close range.
Esrom Nyandoro then sent an effort just over the bar five minutes later, with Leremi threatening a minute later, but his shot flew straight at Swallows keeper Greg Etafia.
Sundowns continued their dominance in the second half, with Nyandoro threatening first with a long range shot which Etafia saved comfortably.
Lerato Chabangu should have done better in the 80th minute when he shot wide from close range after collecting a cross by substitute Lungisani Ndlela.
Chabangu threatened five minutes later when he cut inside before unleashing a powerful, which had Etafia well beaten, unfortunately for the Sundowns striker, his effort came back off the upright.
Swallows were denied a penalty in the 90th minute when Oscar Ntwagae fouled Cecil Oerson inside the area, but referee Daniel Bennett waved for play to continued, much to the disgust of the Swallows bench.