Combine all ingredients in a large food-safe container. Whisk until salt and sugar are dissolved. Place meat into brine at least 2 hours or overnight.
Before cooking, rinse off brine and rub with the salt-free rub below:
¾ cups brown sugar
½ cup granulated sugar
2 tablespoons black pepper
2 tablespoons smoked paprika
2 tablespoons onion powder
2 teaspoons cumin powder