Recommended by & for Sunbrella/Glen Raven Mills, Inc.. Restores lasting water repellency to marine canvas. it stops leaks, protects against soiling and both water and oil based stains, and resists mildew formation and UV sun damage. Spray on, let dry. Your best choice for fabric upholstery, carpeting & breathable wet weather gear. 16oz. trigger sprayer treats 75-100 sq. ft. of marine canvas.