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303 Fabric Guard Water Repellent

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303 Fabric Guard Water Repellent

Protect your marine fabrics from harsh weather conditions with 303 Fabric Guard. This 303 waterproofing spray can effectively be used on a variety of fabrics such as wool, silk, and garment-grade leathers including suede. 303 Marine Fabric Guard also helps restore a fabric’s diminished water and stain repellency, bringing a variety of outdoor boat fabrics to like-new conditions. Fabrics that are treated with 303 Marine Fabric Guard are resistant to soiling and mildew as it protects against fading due to the sun's harmful UV rays.

As part of your ongoing boat maintenance regime, use 303 waterproofing spray and extend the lifespan of your outdoor and marine fabrics.


  • Effective when applied to outdoor leather seats, boat covers, awnings, Dacron sails and outerwear.
  • Safe for synthetic and natural fibers in marine environments
  • Protects fabrics against both water-based and oil-based stains
  • Will not alter or impact fabric color, feel, flammability or breathability
  • 303 Marine Fabric Guard is recommended by Sunbrella, a leading outdoor fabric manufacturer


  • Covers 75-100 sq. ft. per 16 oz. on lightweight fabrics
  • Covers 40-75 sq. ft. per 16 oz. on heavier fabrics
  • Curing: 6-12 hours (depending on temperature)

Sizes Available

  • 16 oz.
  • 32 oz.
  • 1 Gallon

Available for ground shipping only

How to Use 303 Fabric Guard

  • Apply to fabric above 70°F/21°C. For quicker drying/curing and best results, apply in full sun.
  • In a well-vented area, apply Fabric Guard on fabric until damp, overlapping in a crisscross pattern. Do not saturate.
  • Treated material must be protected from moisture caused by rain or dew until completely cured.
  • Curing will take 12-24 hours depending on the temperature.
  • If 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. 

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