Interlux Interstain Wood Stain. Fills and stains the wood. Perfect for staining brightwork and restoring color to faded timber. A great base for varnish. Fade resistant. Can be used on interior and exterior surfaces. Can be mixed with one pack varnishes, as per thinning recommendation, to achieve a darker finish. Suitable for all types of interior and exterior wood. Matte finish. Red Mahogany. Pint.