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303 Marine Fabric Guard - 1 Gallon - 30674

$89.99 $119.99
SKU: 77123

Manufacturer Part #: 30674

303 Marine Fabric Guard - 1 Gallon - 30674

Marine Fabric Guard - 1 Gallon


  • Fabric protector spray that strengthens and restores lost water repellency for marine fabrics
  • Safe for synthetic and natural fibers in marine environments
  • Protects against both water-based and oil-based stains
  • Does not alter fabric color, feel, flammability or breathability
  • Recommended by Sunbrella, leading outdoor fabric manufacturer

303 Fabric Guard is the only product recommended by and for Sunbrella, as well as other fabric manufacturers to restore lost water repellency to fabrics. Resist water, even when you’re on the water. 303 Fabric Guard creates a powerful shield to greatly increase repellency and protect against oil and water- based stains. Spray it on outdoor leather seats, boat covers, awnings, Dacron sails and more! When applied to clean and dry fabrics, 303 Fabric Guard restores lost water and stain repellency to straight-from-the-factory levels. Keep all your favorite fabrics crisp and clean for years to come.


  • Product liquid and spray are flammable, keep product and treated article (until dry) away from heat, sparks or open flames. Do not smoke when applying 303 Fabric Guard. Spray until evenly wet, overlapping sprayed areas.
  • NOTE: Reduced coverage when applied with paint roller or brush. Apply to fabric above 70°for 21°C. (For quicker drying/curing and best results, apply in full sun.) Treated material must be protected from rain/dew until completely cured.
  • CURING: 12-24 hours dependent on temperature. If these steps are performed correctly, the material will be water repellent at this point. 303 Fabric Guard will need reapplication depending on fabric exposure to sunlight and weather conditions; pour water on fabric to determine need to retreat fabric.
  • COVERAGE: 40-75 sq. ft. (30 x 60cm) depending on material and application method.



  • Untreated: Cushions are stained and water soaks into the fabric.
  • Treated with 303 Fabric Guard: Water and soil repel the fabric, prolonging its life.


  • Untreated: The umbrella is stained with outdoor elements and rain.
  • Treated with 303 Fabric Guard: Water and soil repel the fabric and it is protected from outdoor elements.

Product : 303 FABRIC GUARD 128 FL OZ
Manufacturer : 303
Manufacturer Part No : 30674
Product : 303 FABRIC GUARD 128 FL OZ

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Reviews (5)

Customer Reviews

Based on 5 reviews
Thomas Deaver
Outdoor addic

Quick delivery awesome product we had 4 in of rain no water penetration through the umbrella, will buy again and do recommend

Linda Frew
Great Product

We use this on our motor home awnings and our patio cushions that have sunbrella fabric. After using this product, the water just rolls off.

Marine Maintenance Manager

A great product to keep sunbrella fabrics as water-repellant as when new. Application is easy, only a few hours to dry in the sun.

Best out there

303 Waterproofing is the best out there in my opinion.I have used other waterproofing but haven't found any as good as 303 . It's a little more expensive than the other ones but is well worth it

Mike Catella
Home owner, Boater

Use this product on my boat cover and all outside porous fabrics. No other product matches the performance.



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