Cutek Extreme Interior & Exterior Penetrating Timber Wood Oil CLEAR (NEW!)CUTEK Extreme CUTEK Extreme is a high performance oil based wood stabiliser which is suitable for interior walls and ceilings, and exterior applications. It highlights the natural beauty of wood and extends service life. CUTEK Extreme penetrates deeply into wood to control moisture, and minimise warping, cupping and splitting. It has a unique self healing effect that migrates to any perforated, cut or damaged area, automatically sealing timber against