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Disclaimer- We recommend you higher a experienced, licensed, professional. We provide this resource to help inform customers about manufacturer's recommendations and the dangers of high pressure.
James Hardie
Clorox Bleach
"During use and disposal, 95% to 98% of bleach rapidly breaks down back into salt and water. The remaining byproducts are effectively treated by municipal wastewater and septic systems. Bleach does not contaminate groundwater because it does not survive sewage treatment, either in municipal sewage treatment plants or in septic systems. No dioxins are formed."
Sunbrella fabrics do not promote mildew growth, however, mildew may grow on dirt and other foreign substances if not removed from the fabric. To remove mold or mildew:
Prepare a solution of 1 cup of bleach and 1/4 cup mild soap per gallon of water.
Spray on entire area and allow to soak into the fabric for 15 minutes.
Clean entire surface area with a sponge, clean towel or very soft bristle brush.
Rinse thoroughly to remove all soap residue.
Air dry.
For severe mold/mildew growth, bleach quantities may be increased.