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He went as far as to call it a " degreaser " he rinses when done and he is a power washing company. He claims he does not use a power washer but he must be using somthing to " rinse " even moss and lichen But what kills me is his prices. I get no less then $ 400 for the front roof of a colonial! He also only accepts cash......nothing else. I think we all know what that means.

I will search thanks Chris. Does it work right away like S/H? As well?

Roof Cleaning Long Island N.Y 516-763-4108 wrote:

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I will search thanks Chris. Does it work right away like S/H? As well?

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 NO, it is not right away like what we use. Sodium and Potassium Hydroxide based roof cleaners are sprayed on, then you have to wait 20 to 30 minutes. The roof turns black, and you pressure wash rinse them off. It does take pressure to rinse that chit, and that causes damage to shingles.

Here is a pdf from Medical Management Guidelines for Sodium Hydroxide (NaOH). That's some scary stuff!

 

oteyde wrote:

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Apple Roof Cleaning Tampa FL (813) 655-8777 wrote:

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It is a sodium and/or potassium hydroxide based roof cleaner, see my website saferoofcleaning.com to sell against these guys, or do a search for roof cleaner recall for ways to sell against these guys

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 I searched for roof cleaner recall and came up Jomaps M-1 Deck Cleaner. I then searched Jomaps and discovered they are no longer Jomaps. Their new name is Demand Better Products. And yes they are still selling M-1. http://www.d-mandbetterproducts.com/exterior_roof_cleaner_gallon.html

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 Yes, the original M 1 had much higher levels  of Sodium Hydroxide. The new stuff is watered down by comparasion. Several roof cleaning franchises were and are built around these types of roof cleaners. They will clean a roof, but they are slow in comparasion to what we do, and all require pressure to remove. Often, it can take more then one application, so what do you do ? Apply again, and wait another 1/2 hour, hoping it works this time ? Or, simply crank up some pressure ?

Then, on a really steep roof, they are dangerous, because the roof gets very slick, making a pitch witch necessary.