St Mary’s spent sustained spells on Saturday frustrated at the work-rate from visitors Seapatrick.
However, the Saints came out on top at the final whistle for full points with a 4-2 reward.
The opening goal arrived for Brendan Hagan to cap a positive St Mary’s start.
Ruairi Feeney squandered an early sight of goal ahead of Hagan’s header.
A penalty put Seapatrick level but St Mary’s hit half-time back on top thanks to Sean Brady’s scrambled strike.
Ryan Creaney’s cross was converted by Ryan Lawless for 3-1.
Feeney found his finishing touch before the end of play thanks to a composed finish.
It helped the Saints return to winning ways after back-to-back defeats.