If you are buying 55 gal drums, the lot number will tell you the manufacturing date. Shelf life before drastic reduction in strength is around 30 days.
Gary

Phil Rogers wrote:

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Thanks for the info, Gary.

Haha, a new place that I am going to start using told me that the SH will last 18 months unopened.. I don't know if this is true, but I thought it seemed a bit off.....

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After 18 months the SH will be about the same strength as household bleach. It falls from 12.5% to around 10% quickly and then slows down til it reaches 4-5% and then sits there for quite a while. Good for washing clothes and thats about it.

 

I left some sh out in the fl sun for around one month... approx 4 gallons. I checked it the other day cause I had a simple housewash and thought I'd just use that up...well it turned black! Needless to say I drove to my supplier.

Roof Cleaning Katy Texas (281) 392-2304 wrote:

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The strength of SH depends on the temperature that it is kept at & if it has been kept out of the ultraviolet rays of the sun.  During the summer in Houston Tx you are lucky to have a shelf life of 2 weeks...

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That wasn't the question.

Phil Rogers wrote:

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Thanks for the info, Gary.

Haha, a new place that I am going to start using told me that the SH will last 18 months unopened.. I don't know if this is true, but I thought it seemed a bit off.....

---

OK I will take a shot in the dark on this one, all of their supplies 18 months old?

 

You can use this for testing;

http://www.taylortechnologies.com/product_fliers/BleachSolutions.pdf

I think its around $80.00 dollars or so.. It's pricey.

-- Edited by WDE on Tuesday 28th of September 2010 09:35:47 PM

-- Edited by WDE on Tuesday 28th of September 2010 11:57:20 PM

WDE wrote:

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You can use this for testing;

http://www.taylortechnologies.com/product_fliers/BleachSolutions.pdf

I think its around $80.00 dollars or so.. It's pricey.

-- Edited by WDE on Tuesday 28th of September 2010 09:35:47 PM

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$80 but how many tests can you do with one kit?

 

Wanting to test my final mixture

Is my math right and thinking correct?

100 gallons of final mixture

35% SH = 35 gallons

35 gallons @ 12 ½% actual SH = 4.35 gallons of actual SH

4.35 gallons of actual SH in 100 gallons = a 4.35 % reading 

Roof Cleaning Katy Texas (281) 392-2304 wrote:

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Who cares on what the strength of the final mixture is unless you want to plot its degradation over time.  Obviously you are not too busy, which you should be this time of year.

Spend your time on wiser things like marketing your company and building up business.

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I'll say one thing.

Marcus knows this business!

He is also 99.9% polite.

But, like he said here "Who cares"

This is a "BOOM TIME" I have never been so busy in my life!

Not much time for talking until my Florida snowbirds head NORTH!

Shingles 35% SH 65% H20

Tile 45% SH 65% h20

add surfactants if you wish-I do!

3/4 gal Ammonyx Lo to 100.

I tarp my tanks on weekends and as possible.

The sun will kil the SH quicker than time will.

Of course, Dawn and other ingredients that are not compatable with SH will work against it even faster than the sun!

Alcohol [which can kick it up for a day] will really kill it quickly!