How to Waterproof Cotton Canvas
Canvas made from cotton threads is a naturally waterproof material. The individual threads of the canvas swell as they absorb moisture blocking any water from passing through the spaces in the weave. Still, cotton canvas can benefit from treatment to increase the waterproof properties. Determine the type of canvas before application. Acrylic canvas and vinyl-coated canvas both use other waterproof products. Waterproofing cotton canvas falls within the abilities of do-it-yourselfers with moderate tools and skills. Does this Spark an idea?
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Things You'll Need
- Brush and soap and water
- Garden sprayer
- Waterproofing material such as Canvak
- Disposable foam brush
Instructions
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1
Wash the cotton canvas. Use a brush along with soap and water to clean either the whole canvas fabric or particularly dirty places. Allow the canvas to air dry. Do not tumble-dry the canvas.
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2
Apply the cotton canvas waterproofing material, using one of several commercial products. Use a garden sprayer, a hand-pumped pressure sprayer, to apply the compound. You commonly make two applications separated by a drying time. Spray in a pattern that goes in opposite directions to decrease streaking or uneven application.
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3
Apply the cotton canvas waterproofing material with a brush. Use a disposable foam brush to apply the waterproofing material to the seams of the canvas. Allow the material to air dry.
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Tips & Warnings
Follow the manufacturer's instructions when applying the waterproofing compound. The material is petroleum-based and does have an odor. Perform the waterproofing applications in a well-ventilated area or outdoors.
Confirm the type of canvas product before the application of any waterproofing material. Most of the products meant for cotton canvas are not recommended for other canvas type products.
