For this Oude Rabarberlambik, we macerated rhubarb on young and very old lambik, before kegging it. In total, we used eleven different lambik brews originating from five different barrels. The weighted average age of this rhubarb lambik is more than 17 months. The final intensity of this fruit lambik is 320 grams per litre. 100% 3 Fonteinen.