Ecosote   

Safe and natural substitute to creosote, Ecosote from Bird Brand preserves external timber preventing, fungi, algae and decay. It is very affordable, effective, and also safer for the user and environment. Although water based, Ecosote penetrates deeply into rough or smooth timber just like a solvent or oil based wood preservative. It's also fully water repellent and has a light pine fresh smell to help enhance its disinfecting properties. For the environmentally concerned consumer Ecosote is the way forward.