As part of the finishing process, Sunbrella fabrics are treated with a fluorocarbon finish, which enhances water repellency. This finish is designed to last for several years, but must be replenished after a thorough cleaning.
Based on test results, Glen Raven recommends 303 High Tech Fabric Guard
as the preferred re- treatment product for Sunbrella fabrics. Fabrics should be re-treated after thorough cleaning or after five years of use.
Don't put any of these curtains into your washer or dryer; hand-wash only, letting them air-dry on a flat surface. Wash curtains with warm water, mild soap and a soft brush. You can use a garden hose and mild soap to clean the fabric and leave hanging in an open area.
If fabric has some wrinkling, use an iron, if necessary, but only on the synthetic setting. As some irons exceed the recommended temperature on the synthetic setting, test a small inconspicuous area before ironing entire piece. DO NOT use a steamer or iron set to steam setting.