With only one exception, I've used 303 Fabric Guard to protect my bimini and sail cover every year for the past 8 years. The application is easy: just spraying it on over the canvas. Within minutes its dry, and within 24 hours, any rain water just beads up and rolls over the canvas. The one time I used a different product, I was not happy with the results at all. I'll stick with this one for the foreseeable future.