John Boos Mystery Oil : From the creators of the finest butcher blocks in the world, this NSF-certified John Boos Mystery Oil replenishes the moisture lost from repeat washings and use. This food-grade mineral oil penetrates deeply into the grain of the wood, creating a smooth protective finish. Prevent butcher blocks, cutting boards and wooden utensils from drying, bleaching or cracking. Mystery Oil conditions and maintains the quality of all types of wood food-preparation surfaces. Proprietary blend of mineral oil, orange-scented linseed oil and tung oil is nongreasy, easy to apply, and superior in absorbency. NSF-certified.* 16-oz. Made in the USA. Product Features NSF-certified food-grade oil locks in moisture to preserve wood cutting boards, blocks and utensils Penetrates deeply to replenish the moisture lost from repeat use and washings Prevent wood from drying, bleaching or cracking Nongreasy and easy to apply to create a smooth protective finish Superior absorbency with the proprietary blend of mineral oil, orange-scented linseed oil and tung oil Recommended for all types of wood food-prep surfaces John Boos & Company has offered the finest butcher blocks, kitchen workstations and carts since 1887. The oldest manufacturer of premium quality kitchen equipment in America, Boos has proudly built products for the best kitchens, including the White House *The National Sanitation Foundation is an independent, not-for-profit organization that employs stringent sanitation standards in evaluating food equipment for commercial use.