We have a 1692 sq ft Villa and every 6 months we use Mold Armor on the vinyl siding. Simple to do. Buy the dispenser with the hose end sprayer (shoots up 20 foot to the peak $6.50) and a 1/2 gallon refill container (8.50). This does the whole house. Spray it on, let sit 5 minutes and rinse it off. I have used it about 4 times now and it removes any Mold and Dirt where ever it contacts. The sprayer is a ONE TIME BUY and refill it with the 1/2 gallon refill container. The pressure is only what comes out of you hose bib. Great Product, simple to use and inexpensive. I would imagine others use this product as well?
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