Fethard have had to wait 15 years for a final appearance, but a goal in each half from the superb Tubritt ensured they ended their drought in emphatic fashion against a goal-shy Sarsfields outfit.
Having played into a slight breeze, Fethard were three points ahead at the interval, 2-3 to 0-6.
After Sarsfields, through fine points from Jason Murphy, Lee Walker, Paul Murphy and Philip Cullen had stormed into a 0-4 to 0-1 lead inside 13 minutes, Tubritt scored a superb opening goal one minute later, while Garrett Foley added the second in additional time.
An early Jason Murphy second-half point gave hope of a Sarsfields revival, but Fethard, who deployed an extra man in defence, counter-attacked for points from Chris Colfer and John Tubritt, before Tubritt finished superbly for his side’s third goal 12 minutes from the end.
Fethard will now meet St Martin’s in the decider after they ran out 0-17 to 2-6 victors over Shelmaliers in the other semi-final.
With some excellent points from Ciaran Lyng, Ciaran Redmond and Jamie Carthy, St Martin’s led 0-9 to 1-4 ahead at the interval, the Shels goal courtesy of Eoghan Nolan after 17 minutes.
Just two minutes after the restart Richard Devereux extended his side’s lead and St Martin’s looked comfortable, leading 0-15 to 1-6 with nine minutes remaining.
Almost immediately Brian Malone goaled from a penalty to leave just three points separating the sides, while two minutes later Malone had a penalty saved by keeper Tomas Hayes.
But it was St Martin’s who finished the stronger, adding points through Ciaran Lyng and Jamie Carty, to make it a historic day for the club.