Opens a new window
303® Marine Fabric Guard is the only product recommended by Sunbrella® and other leading fabric manufacturers to restore lost water repellency. Whether you’re on the water or off, this powerful formula helps your fabrics resist water and water-based stains.
303® Marine Fabric Guard creates a strong protective barrier, significantly increasing water repellency. Use it on boat covers, awnings, Dacron sails, and more. When applied to clean, dry fabrics, it restores water and stain resistance to factory-new levels—helping keep your favorite fabrics looking crisp, clean, and protected for years to come.
Usage Directions:
-
Product liquid and spray are flammable. Keep both the product and the treated item (until fully dry) away from heat, sparks, or open flames.
-
Do not smoke while applying 303® Marine Fabric Guard.
-
Spray evenly until the fabric is thoroughly wet, overlapping areas to ensure full coverage.
-
Avoid application with a paint roller or brush, as this reduces effectiveness.
-
Apply only when fabric temperature is above 70°F (21°C); for faster drying and best results, apply in full sun.
-
Protect treated material from rain or dew until completely cured.
Curing Time: 12–24 hours, depending on temperature and humidity. Once fully cured, the material will be water-repellent. Reapply as needed based on fabric exposure—test by pouring water on the surface to see if it beads up.
Coverage: One 16 oz bottle treats 40–75 sq. ft., depending on material and application method.
Example Use Cases:
Boat Cushions
-
Untreated: Cushions stain easily and absorb water.
-
Treated with 303® Marine Fabric Guard: Water and dirt repel from the surface, extending cushion life.
Umbrellas
-
Untreated: Fabric absorbs rain and stains from outdoor elements.
-
Treated with 303® Fabric Guard: Fabric repels water and stays cleaner, resisting environmental damage.
Shop 303® Marine Fabric Guard’s size variations on Amazon:
16oz – SKU 30616Opens a new window
16oz 6-PK- SKU 30616-6PKOpens a new window
32oz – SKU 30604CSROpens a new window
32oz 6-PK – SKU 30604CSR-6PKOpens a new window
1 Gallon (128oz) – SKU 30674Opens a new window
1 Gallon (128oz) 4-PK – SKU 30674-4PKOpens a new window