Re-Treating Sunbrella® — Which Side Is the Outside?

Item # X-HT-200678

All Sunbrella® fabrics are treated with a fluorocarbon finish that makes them water-resistant, but after years of being out in the elements and being pelted by rain the finish can wear off. If you notice that your outdoor Sunbrella fabrics aren’t beading water like they used to, it’s probably time to re-treat them and restore their water repellency. We’ll show you what to use and how to re-treat your fabric so it repels water again.

303 Fabric Guard on Sunbrella with beads of water.

To restore the water repellency of your Sunbrella marine fabric we recommend using 303® Fabric Guard. Actually, 303 Fabric Guard is also the choice of the manufacturers of Sunbrella as the best treatment to restore water repellency. 303 Fabric Guard also protects against stains and provides UV screening without affecting the color, feel or breathability of the fabric. While 303 is great for canvas fabric like Sunbrella, it should not be used on vinyl, zippers, plastics, rubber, fiberglass or imitation suede, so be careful when applying it to your canvas near these other materials.

How do you know when to re-treat your Sunbrella? We recommend always re-treating your fabric after a thorough cleaning and also when you notice the fabric stops beading water. Do a quick test of your cover every couple of months by flicking a small amount of water on the cover and see if the water beads up and runs off or if it soaks into the material. If the water soaks in, it’s time to re-treat. After re-treating your cover, 303 Fabric Guard restores your Sunbrella fabric to about 85% to 90% like-new water repellency.

In this video we’ll show you step-by-step how to re-treat a boat cover with 303 Fabric Guard. Also included is a brief discussion of the differences between the different lines of Sunbrella fabric and how to tell which side should face out on your projects (Hint: for most Sunbrella fabrics, it doesn’t matter!).

You can find 303 Fabric Guard and other products for cleaning and maintaining your fabrics in our Maintenance product category.