Vacuum marinating presses the marinade tightly against the food, which helps it coat evenly. Chamber sealers make this easiest because they seal liquid directly.
With a chamber sealer
Bag the food with the marinade and seal. The Avid Armor USV20 and USV32 have marinate functions, and the Anova Precision Chamber has an Infuse program.
With an edge sealer
Use a vacuum canister and your sealer's accessory port, or freeze the marinade in the bag first so it doesn't reach the pump.
Safety
Marinate in the refrigerator, never at room temperature.
