This lowered VOC version has been formulated for the low VOC areas. Watco teak oil finish is a deep penetrating oil specifically formulated for dense exotic woods such as teak. Teak oil can be used on interior surfaces such as furniture, trim, or paneling and on exterior marine surfaces such as outdoor furniture, boat trim rails, and doors. Apply with brush, roller, or spray to dry, finish-free wood surfaces. Allow to dry overnight prior to use.