For the Rust stain that I took off the roof it was a Ben Franklin premium. It is starting to pay dividends. Use the search and look for my Rust stain, covered 1 quarter on the corner of a house. Received great info from the pro's on this site, I don't leave home without their knowledge in my portfolio.
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Fred Winters Home Maintenance Services 941.628.9558
Houston Texas Roof Cleaning (281) 853-5753 wrote:I got an call today to clean rust stains off of a roof. I am going to use OX Hello Blake, which areas of the Houston area do you work? We are mainly West Houston. Who is your local supplier of OX? Feel free to call if you want to discuss rust removal pricing. Best to discuss pricing in private not on the public internet.
This is the formula below that Larry, from All Surface in Largo Sent me to use, my only change was a pump sprayer vs. the downstream, felt I had more control. After the stain was gone went on to clean the roof.
____________ Fred, the OX will work on that Sulfur Rust stain. You may even want to mix up a batch in a 5gal bucket and down stream it. (providing you have a pressure washer). I would go 1 to 1.5lbs of OX to 5gals water. As soon as the Rust disappears I would rinse it off with fresh water to prevent it from leaving a huge white area on the Shingle Roof. This mix will also work perfectly for the stains on the outside of the house as well. ____________
Don't know if your stains are as large or the same, just an idea of what OX can do.