This product is sealed with a mixture of either wood oil or wax oil. The face of each board is brushed during the manufacturing process to provide a matt textured surface in comparison to the a lacquered product which is smooth in appearance. It is also smoked to darken parts of the board and add character. As product is oiled and should be sealed with a hard wax oil immediately upon installation. It also needs to be regularly maintained every 12-18 months by reapplication of appropriate hard wax oil to maintain the overall look of the boards. We strongly recommend seeking the advice of a professional fitter before applying any products.