You state it is not recommended unless a high percentage of color - what number indicated a high percentage as I wanted to compare to the designer tile we purchased from you?

Our Rubber Floor Finish and Sealer is best used on floors with 75% + color flec but can be used on any color floor. When used on black floors, the sealer will make it appear dull. If there is any level of color flec in the floor, it will help to keep the color popping for as long as the sealer is on the floor.