How to Restore Water Resistance to Fabric

Many outdoor fabrics, like Sunbrella®, are water resistant naturally. But over time, after washing and being pelted by rain, some of that water resistance starts to wear away. One question we get asked a lot is “can I restore water resistance to my fabric?” The answer is yes, you can! We’ll show you what to use and when and how to apply it in today’s post.


You can bring back the water resistance to your fabric with a spray-on treatment. Our favorite is 303® Fabric Guard. This product will restore water repellency, protect against stains and provide UV screening without affecting the color, feel or breathability of the fabric. It is safe to use on boat covers, awnings, patio cushions and much more. 303 Fabric Guard should not be used on vinyl, zippers, plastics, rubber, fiberglass or imitation suede, however.

How do you determine when and if your fabric needs treated? The best way to tell if you fabric needs treated is to do a quick test. Flick a small amount of water onto the fabric and watch how the water reacts. If the water is soaked into the fabric almost immediately, your fabric needs treated. To be diligent with your fabric, you can run this test every couple of months. You should also always retreat your fabric after a thorough cleaning.

How to Apply 303 Fabric Guard:

  1. Thoroughly clean your fabric and let dry completely before applying the fabric guard.
  2. Test the colorfastness of the material by spraying the fabric guard in an inconspicuous area and wiping the area while wet to see if the color transfers.
  3. In a well ventilated, area spray overlapping sprays until the fabric has been evenly misted (two light coats works better than one heavy coat). Be careful to avoid overspray on zippers and clear vinyl, as the fabric guard will harm these materials.
  4. Allow to air-dry and cure for 8 to 12 hours, depending on weather conditions. It will dry best in the sun on a hot day.
  5. Mist with water to test. Water should bead up on the fabric.


You can find 303 Fabric Guard and other great fabric cleaners and protectants at

Do you use a fabric guard to restore water repellency to your fabrics? Leave us a comment and share your experiences!


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