TimberBrite TM wood brightener is a liquid concentrate that is mixed with water to brighten and restore the natural beauty of all species of exterior wood. Product removes tannin and rust stains and is recommended for use on redwood. TimberBrite will not harm wood fibers, grass or most plants when used properly. TimberBrite removes dirt, grime, tannin, rust, fungi stains and weathered graying from wood surfaces. Can be used as a cleaner and brightener for redwood, or as a neutralizer to further brighten wood species, like pine, that have been cleaned with TimberWash. Click Here for More Detailed Information