Neon or bright colored pressure washing hose

Did we ever get an answer on this perhaps on another post? Seeing that most does post treat and leaves, I assume it’s a non-issue, but I’d love to hear someone confirm it.

Sean, I don’t post treat because I use heat on all concrete, so no need to afterwards, looks great. But sodium hypochlorite is a strong alkaline, in concentrated form I’ve read it will attack concrete slowly. Maybe at lower percentages it’s probably fine, I think most just treat and leave.

Maybe @CaCO3Girl has some thoughts?

Plate full of tainted baloney.

I’m sorry, I don’t really have opinions on processes. I’m a chemical expert who has never pressure washed anything. You may want to copy some of the more experienced members.

@CaCO3Girl I was curious if you knew if sodium hypochlorite could be damaging to concrete. After cleaning a driveway many of us put a 3-4% solution of it on the concrete and leave it on there to dry.

Sunlight - Exposure to UV light degrades sodium hypochlorite. So like leaving it on a roof because it’s highly reactive it becomes salt so shouldn’t damage the concrete like it doesn’t damage a roof. That’s my understanding at least.

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Hypochlorite is used as a sanitizer. A family of chlorine compounds such as Calcium Hypochlorite and Lithium Hypochlorite, both granular, and the liquid Sodium Hypochlorite. When these compounds contact water, they release Hypochlorous Acid, the active sanitizing agent. Sodium hypochloite is strongly alkaline, in concentrated form it will attack concrete slowly.

Quote From The Concrete Society

My take on that is, don’t store your bleach in a tank made of concrete. On a surface that is open to air dry, in the sun, I can’t imagine that the SH would be active long enough to do any real harm.

That’s a bunch of marlarky for what we do. Whole lot of concrete swimming pools out there with bleach in them

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Pools are made of concrete, not all but lots, sooo… not buying the whole story.

Could SH be damaging to concrete…I don’t see how. Concrete is alkaline, SH is alkaline.

If SH was damaging to concrete then concrete cleaners would be alkaline, not acidic.

Basically you leave a thin coating of SH on any surface and it dries to salt water. So if it can withstand the SH cleaning it can withstand the SH drying on it.

In my opinion.

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Yeah, I think what they were saying was Sh in concentrated form, not diluted. Swimming pool water has very low % amount of sh in it so shouldn’t do any harm. I guess the question is what % causes issues if any?

@Kentucky1234, here ya go. Don’t store your 12.5-15% SH in a concrete container, and you shouldn’t have any other issues with damaging concrete.

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Even if it did hurt it I don’t see one application every few years doing anything to it. We know deicer can eventually damage concrete but if you just did one application a year it’s not going to do a thing even years later. Not to mention, the deicer is on there sometimes for weeks at a time. SH is rinsed away by the next rain. I’m not comparing deicer to SH salts just using deicer as an example because we know actual salt can damage concrete. I used salt all winter for 10 years at our first house and it didn’t do a thing to the driveway. I just don’t see anyway that SH will do damage by using once every year or so.

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I personally don’t need to worry, I don’t post treat. And i don’t have a concrete container, :joy:

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