Mamelodi Sundowns dominated the early proceedings in front of their home fans who were keen on cheering their team to victory.
After coming close severally, Masandawana eventually got their goal in the 22nd minute. A teasing low cross from Aubrey Modiba was turned into the own net by Tresor Yamba.
Five minutes after the break, a poor first touch from Iqraam Rayners pushed the ball a little far. Goalkeeper Badra Sangare was wrongfully adjudged to have fouled the attacker - who clearly dived, and the referee pointed to the penalty spot.
R63 million-signing Arthur Sales, who was named Man of the Match, sent Sangare the wrong way to make it 2-0 in favour of the Brazilians. It was his first Premier Soccer League goal after joining Downs in the summer transfer window.
In the 90th minute, Thapelo Morena teed up Rayners who did well to hold the defenders before scoring his fourth league goal this season to ensure the champions won 3-0.
The win took Sundowns top of the table with 21 points from eight games, the same as Orlando Pirates who have played a game less but with an inferior goal difference. The Soweto giants will be in action on Sunday against Stellenbosch at the Orlando Stadium.