Effective on all fabrics. It protects from water, soils, oils, bird droppings, and environmental pollutants. It resists mildew, stains, and increases weatherability. It will not change the color, feel or breathability of the fabric. Recommended for use on awnings, canopies, tents, patio furniture cushions, umbrellas, spa covers, tarps, boat covers, bimini tops, hunting fabrics, camping gear, leather, synthetics, and vinyl. Formula is non-solvent and non-silicon. One Gallon covers up to 150 sq. feet.