It's time for the break and Munster will head into the changing rooms happy as they secure the bonus point as the clock ticks into the red.
Despite an exciting response from Jacob Stockdale on his 150th cap, the visitors have raced into the lead with two tries from Alex Kendellen and scores from Marnus van der Merwe and Dan Kelly.
A huge response will be needed by Richie Murphy's side in the second half if they are to give themselves a shot.
This is not looking good for Scarlets, who made a dream start to open the scoring through lock Sam Lousi.
Benetton deservedly hold a 14-point lead at half-time thanks to scores by hooker Siua Maile, wing Onisi Ratave and flanker Michele Lamaro.
Scarlets need something special if they are to turn things around and avoid defeat for the first time this season.
Wayne Pivac said before the game that he wanted his Benetton side to start putting their foot on the throat of opponents, and they have the chance to do that on his return to Llanelli.
The Italians are 40 minutes away from a first win of the season.
Ian Humphreys Former Ulster fly-half Ian Humphreys on BBC Sport NI
It's a brilliant forward performance by Munster. It's been nothing flashy, and it's frustrating for Ulster. You have to tip your hat to how they have performed. They have been ruthless.