Restore water repellency to Marine fabrics.Star Brite Outdoor Collection Water Repellant Fabric Protectant is formulated with PTEF, a protective polymer barrier coating to restore water repellency to all outdoor fabrics. If surface to be treated is dirty or stained, clean with Outdoor Collection Heavy Duty Fabric Cleaner (sold separately). Once fabric has dried, apply Water Repellent Fabric Protectant with sprayer, brush or sponge, spreading evenly to thoroughly wet the surface, taking care to avoid overspray or dripping onto surfaces not being treated. Let dry for 6 hours.Key FeaturesPTEF polymers help repel UV rays that cause fadingHelps prevent mildew stainsDoes not change feel or breathability of fabricFor dirty or stained fabric use Outdoor Collection Heavy Duty Fabric Cleaner