In an opening half that featured just one solitary try, the dominant theme was Leinster’s superiority in the scrum.
With former Leinster player Michael Ala’alatoa appearing to struggle on their tight-head side, Munster could not get to grips with their opposing front row, who were able to use the set-piece to relieve pressure time and time again.
Despite those difficulties, Munster still enjoyed plenty of territory but were lacking in accuracy when it came to the crunch.
Jack Crowley missed touch in what was a generally poor kicking display from those in red, while a Mike Haley knock-on after a poor Tom Farrell pass ended another attack.
Leinster struggled to convert their own opportunities but did take a 7-0 lead into the break thanks to Van der Flier’s early score.
After one of those initial scrum penalties, the visitors kicked to the corner with Ronan Kelleher finding Caelan Doris from the subsequent line-out.
While the maul made only marginal headway, there was to be no stopping Van der Flier when the back row peeled off the back and ran through the tackle of Craig Casey to score.
In what continued to be a low-scoring and disjointed game after the break, Harry Byrne and Crowley traded penalties a quarter of an hour after the restart.
Approaching the final quarter, Byrne added another three points with the boot but, as both sides turned to their benches, it felt a game already lacking in flow was becoming even more disjointed.
Replacement centre Dan Kelly’s try in the 70th minute set up an absorbing finish but, try as they might and despite plenty of late possession, Munster could not find a way through the Leinster defence for the telling score.
In truth, while the game did not lack intensity or ferocity, given the paucity of attacking quality on show, it was a fitting end to such a contest.
Both sides face another interprovincial derby in the URC next week with Munster travelling to Ulster on Friday and Leinster hosting Connacht the following day.