Bird brand Shed & Fence One Coat Protection is an advanced and superior timber treatment specially formulated for use on rough sawn garden timbers. Wax enriched resins repel water so it is ideal for fencing, sheds, trellis and other garden timbers. Safe for use around plants and pets when dry. - 6m2 per litre. 5 litres should be sufficient to treat 7 fence panel sides, although this may vary depending on the absorbency of the wood.