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Sodium Percarbonate?

Mar 22, 2009

Sodium Percarbonate will dissolve at 8 ounces/gallon with hot water maximum.

I like to add a little Sodium hydroxide, which helps make it dissolve easier if you don't have hot water available or need extra cleaning power.

Of course we all know better than to use sodium hydroxide to clean asphalt shingles, but sodium percarbonate plus a little sodium hydroxide works great for wood restoration (cedar shake roofs)

I usually add about 1-2 ounces/gallon of sodium hydroxide to my sodium percarbonate 6 ounces/gallon mix plus dawn. This will give you a wicked wood cleaner, and if you buy in bulk (50 pound bags) it will save you half to ten times your money compared to name brand products.

-- Edited by Roof Cleaning Pro Greensboro NC (336)362 7659 on Tuesday 22nd of September 2009 11:59:23 PM

Guest

Yea Mike, I use basically the same thing as you on wood. The darkening effect of the hydroxide is easily remedied with a little oxalic. I am going to play around with mixes for roofs(No hydroxide). Just want to see if I can make it strong enough to clean a roof.

Jeff

Mar 22, 2009

Yes, I forgot to put neutralize with oxalic acid.

I did write it on the cedar shake roof thread though.

I thought about trying it on asphalt roofs, but since you and Chris have already tried it and it sucks, I've decided not to waste my time.

Maybe adding alcohol to it would help, like Apple Cider but w/o bleach.

It probably still won't help much. BLEACH IS KING!

Guest

Experimenting is fun, and adding alcohol is a good idea, I mean you never know until it's tried. But yea, the percarbonate method is a tough road, not even as good as calcium hypo. But I like playing. Maybe we will stumble onto something.

Jeff

Mar 22, 2009

Like Don Lapre?

By placing, thousands of tiny classified ads, that I just STUMBLED ONTO!!!!!

Guest

Ha, Ha,....Yea, how about that guy. I think he ended up in trouble or something.

Jeff

Guest

Mike how much dawn did you put into that 1 gallon mix with the sodium percarbonate and hydroxide mix for wood cleaning, just wondering.

Guest

Bout like roof cleaning I guess, helps the mix cling to verticals and also keeps the mix wet longer.

Jeff

Nick_K · Guest

Hi Jeff,
I have picked up a maintenance contract for a beer garden decking - treated pine. I plane to use your sodium percarbonate with sodium hydroxide and oxalic acid to neutralise.
What concentration oxalic acid should i use to rinse with?

Guest

Hi Nick, I usually downstream the oxalic on at about 8 oz. per gallon. If you're applying with a dedicated sprayer, I'd say 1-3 oz.per gallon would suit.

Jeff

Nick_K · Guest

Thanks Jeff,
Much appreciated..I will be downstreaming this one too.

Jul 20, 2009

Oxalic 1-3oz./gallon is a little weak.

To clean wood effectively enough I use 6oz/gallon percarb 1-2oz/gallon hydroxide

after pressure washing you need to neutralize with a similar concentration of oxalic acid.

6 ounces/gallon of oxalic will brighten and neutralize the wood better

Shingle Shiner · Oct 5, 2010

Love how well this has been covered. Thanks jeff

The Roof Cleaning Institute Of America Training & Certification Forum "Find A Certified Roof Cleaner Directory"

The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"