How to Maintain Canvas

Made of natural cotton fibers, canvas has a natural ability to shed water. While not waterproof, canvas fibers swell when wet and then tighten when dry, making the spaces between the threads smaller than a molecule of water. Used for tents, awnings and covers, canvas, when properly maintained, will last for decades. If not properly cared for, canvas can rot in a matter of months. To enhance it water shedding abilities, canvas can be treated with silicone based sealants.

Things You'll Need

  • Broom
  • Chlorine bleach
  • Bucket
  • Natural soap
  • Hose
  • Waterproofing treatment
  • Paint brush
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Instructions

    • 1

      Brush any dirt and debris from the canvas with a broom. Mix 4 oz. chlorine bleach in a bucket with a gallon of water. Apply the solution to any stained areas with the broom.

    • 2

      Wash the canvas thoroughly with a natural, mild soap --- using harsh detergents will strip any waterproofing agents that have been applied to the fabric. Rinse the canvas thoroughly with a garden hose. Carefully examine the underside of the canvas for leaks or drips.

    • 3

      Allow the canvas to dry thoroughly. Apply a silicone based water-proofing treatment, approved for canvas products, with a large paint brush. Apply the treatment, according to the manufacturer's specifications, to the outside of the canvas over any areas where leaks were discovered.