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Need Product

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I need a product that will remove dried "bleach" stains. Apparently, someone has pressure washed this "special material" roof using bleach and allowed it to dry before rinsing. It appears they sprayed bleach from the top down and didn't rinse in time. There are many run streaks as well as big stained areas. The roof material is made of something similar to vinyl and it is white. I did a few test patches using a combination of bleach, soaps and TSP. The stained areas were lightened but could not remove them. I even tried whitewall tire cleaner but no help. This project is huge and would love to be able to offer a solution. The roof is several hundred thousand square feet.

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Hi

To remove alkali/salts/soaps you need acid. I've cleaned windows of dried house wash/water deposits with vinegar and also bathroom cleaner (for soap scum and calcium deposits) as they are both acidic AND gentle. Of course you could try any other acid. Good luck.

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