Generally speaking, blackbutt has a straight grain, although it may interlock sometimes. Decking can be used to complement internal flooring and form a natural flow from indoors to outdoors; Hardwoods are easy to stain to complement an outdoor colour scheme or can be left raw to create a natural, weathered look; Durable hardwood timber decking is a natural product and can be refinished to its original state with little fuss Price: $5.15. DECKB13019. Usage: external decking. Hardwood Blackbutt Kiln Dried is perfect for structural use especially if you would like to keep it exposed .Rated F27 and has a natural fire resistancemaking them suitable for use in many bushfire prone areas under Australian Standard AS3959. //