Postsaver Creostain is a water-repellent, oil-based wood treatment that protects exterior wood against water damage, cracking, twisting and swelling. It is ideal for exterior fences, sheds and barns and can be used on rough, sawn or smooth timber. Creostain has similar physical, water resistant and application characteristics to traditional Creosote, but contains no biocides. It's suitable for application with a brush or sprayer and is available in two colours; light brown and dark brown. A deeper colour can be attained by applying additional coats.Postsaver Creostain is ideal for exterior fences, sheds and barns. Creostain has similar physical, water resistant and application characteristics to the traditional Creosote, but contains no biocides. Suitable for application with a brush or spray and available in two colours light brown and dark brown. A deeper colour may be attained by applying further treatments.