Sean says Glasgow pre-season preparations have gone well but he knows that from Friday, the intensity will be completely different as league points are up for grabs.
He told glasgowwarriors.org: "Our game against Sale at Firhill was a good stepping stone but we know it's going to be a massive physical test against Leinster.
"It's always a good battle with Leinster. They've got a lot of youngsters as well but they've also got plenty experience. The back-row, which I rate very highly, is their weapon."
With Glasgow's injury problems well-documented, Sean has been impressed with the application of some of his younger charges, particularly Richie Gray whose task it is to fill the void left by club captain Alastair Kellock.
"Richie Gray knows that Al Kellock's out for a while so he's really taking that mantle," said Sean. "He and Tom Ryder are forming a really good second row combination.
"We had 2,500 people at our pre-season game which has never been done before, so we're obviously capturing peoples' imagination to have that number at a friendly.
"They made a lot of noise and that's really important. I hope they do it again on Friday and we give them reason to do that."
This game is live on BBC ALBA and BBC Radio Scotland.
15 Bernardo Stortoni CAPTAIN
14 DTH van der Merwe
13 Max Evans
12 Graeme Morrison
11 Federico Aramburu
10 Ruaridh Jackson
9 Henry Pyrgos
1 Jon Welsh
2 Fergus Thomson
3 Moray Low
4 Tom Ryder
5 Richie Gray
6 Ryan Wilson
7 Calum Forrester
8 Richie Vernon
Substitutes: 16 Pat MacArthur, 17 Ed Kalman, 18 Ryan Grant, 19 Aly Muldowney, 20 Robert Harley, 21 Duncan Weir, 22 Hefin O'Hare, 23 Peter Murchie