Saints skipper Stephen McGinn was hailed as Premiership class after finally breaking his goal duck for the season and sending his side a step closer to the promised land.
The Paisley playmaker grabbed the crucial second and ran the show as the Buddies brushed off Dumbarton to move eight points clear of stuttering Dundee United in the promotion race.
McGinn – making his 100th start – is looking to lead his side to the top flight and boss Jack Ross is convinced the midfielder would shine among the elite. He said: “Stephen is a Premiership player playing at this level.
“He has been taking a bit of stick because he hasn’t scored this season. It’s not like him because he has always popped up with goals in his career.
“His goal is indicative of him as a player – it was a really good finish. I was pleased for him because his all-round contribution has been terrific.”
Ross was thrilled with his side’s display on a tricky day.
Cammy Smith pounced with a header soon after half-time before McGinn sealed the Saints’ ninth win in their last 11 games.
It was a dominate display in tough conditions and the manager admitted his men are flying at the moment.
He said: “You take any victory at this time of year but we played really well on a heavy pitch.
“It was as good a performance as we’ve had here. We remained patient. The squad is in a good place right now.”