The 1997 and 2005 Lions prop was impressed with what he saw in Asia and now he wants to ensure the group who face the Force continue where their colleagues left off, regardless of how much of a 'warm welcome' the Perth-based franchise offer at Patersons Stadium.
"All we can speak about is us. For these guys starting in Perth, it's their first chance in a Lions shirt," said Rowntree.
"Very quickly on a Lions tour you can go to the back of the queue if you don't perform. So it is down to our guys to perform irrelevant of who is on the field for them. If that amounts to a big win then fantastic.
"There are a lot of familiar names in that Force forwards pack who I have seen and who have played for Australia for us to respect. These guys have been playing and training together and they will be more
organised than the Barbarians.
"We're looking to see guys fitting in to the way we do things, fitting into our systems and the way we play, adapting but still bringing their game that got them selected in the first place.
"I don't think anyone will be taking liberties. It will be down to the referee to deal with such liberties: we'll be concentrating on the game. There are enough opportunities in the game to be physical and put your mark on the game - the scrum, the breakdown and tackles are all physical moments.
"We want to play positive rugby. We have to be competitive and physical, but we have to play within the laws. We have to deal with the intensity of what the opposition are going to try and do. We're here to play our game and worry about ourselves."
Rory Best is one of five debutants in The Lions' starting lineup, with the Ulsterman named at hooker after his late call up to replace the suspended Dylan Hartley.
Rowntree believes the Ireland international will bring a hugely professional approach to proceedings, while he is also keen to see Ospreys lock pairing Alun Wyn Jones and Ian Evans replicate the form they showed when Wales saw off England in Cardiff back in March.
"There were a couple of positions in the forward pack which we had long conversations about (prior to squad selection on April 30) - back row and hooker. Rory was very close and I've been impressed with his attitude coming on," added Rowntree.
"He's got up to speed with everything and been very professional. He's good to have around and gets on with things.
"Ian and Alun Wyn get a chance and I thought the pair of them played very well at the end of the Six Nations. They played very well against England and had a real presence on the field. We will be looking for that against the Force.
"They're both good lineout athletes and they've trained well with Besty. We're looking at combinations and we're looking at splitting up combinations at the moment as well. Having that Welsh contingent around with Welsh coaches is important, because it means they have got up to speed with things quickly."