Want something to wow your guests with this summer? The Barbecue Tree Bark Rub is a perfect addition to any low ‘n’ slow cooked, grilled or roasted meat.  The barbecue tree bark rub is an Aussie twist on the traditional barbecue dry rub Instructions: Lightly rub meat with a small amount of oil before generously seasoning. Generally, 20g of rub will season approximately 2kg of meat.