I have yet to come across the brisket marinade, but I have used the regular Allegro marinade for years on steaks. The only thing with marinating a brisket, it's not going to get very deep into the meat, depending on the thickness of the brisket. If your doing a smallish flat only, say in the 4-6 pound range, it might do fine. A better choice might be injecting the marinade into the meat in a checkerboard fashion. Or if you would rather marinade, score the fat side of the meat so that the marinade can penetrate both sides, then marinade for about 3-4 days, instead of just overnight, flipping the meat every 12 hours or so to try and get the marinade in the meat evenly. I have tried marinating in the past, but prefer to inject with a commercial injection, rub it down and smoke it. Good luck to you.