I guess you are talking about the ResQ Max from Air-Man.
Don't know anything about this one specifically, but I would be very skeptical about using any "sealer" on a high pressure RV tire. Injecting sealer, even in a tiny hole, is a gamble at best. It might let you limp to a service area at low speeds, but I wouldn't trust it for anything else.
The spec quotes inflation to 2.5 Bar in 4-6 minutes, but 2.5 Bar is only 36 psi. Not even in the ball park for pressures on larger rv tires. I have no idea how big a 50 liter tire is either, but I suspect it's a smaller air volume than most motorhomes utilize.
In short, this is probably good only for a passenger car tire (and I personally wouldn't use it for that either).
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL