Ultra-Safe Plus+ Commercial 50% Stronger concentration: 1 quart (32 oz.) of the concentrated will make 1.5 gallons of our regular full strength Ready to Use product. Ultra Safe Plus is a powerful commercial hypo-allergenic and non toxic cleaner. Works to eliminate Gram (-) and Gram (+) bacteria by working in a microbial action. It is used primarily in tough to clean and unsanitary conditions. Works wonders on fungus, mildew, molds and spores.