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Most everybody buys 12.5%. So its pretty much the same.
Try to only buy enough that you will use in 30 days. After that it starts to lose strength.

I talked to a few different chemical company's in the beginning of summer about the 15% SH and when they first make SH in bulk it is 15% but once they put it in the 55 gl drums or haul it and place it in large containers it is usually about 12.5% ratio but it will lose its strength after a period of time. I usually get 4 to 6 55 gl drums a week but if I have a big job I can get it with in a 2 day period if needed.

Most SH is 15% by volume 12.5% by weight, or maybe it is the other way around?? Either way, they may actually be the same thing. SH breaks down rapidly then stabilizes at the 12.5% level for 30-60 days then rapidly breaks down to 1-3%  One distributor I bought it from used to sell it 2-days out of the factory and it was at very very strong for a few days then became the same as any other 12.5% I have used.  Also I have a friend that works at a SH factory and he brings me 25% percent sometimes in 5 gallon jugs.  It seems the same as the 2 day out stuff I was getting.  Too bad they wanted way to much $$ for it to compete.  I was paying over $4 per gallon!!


-- Edited by Baltimore MD Roof Cleaning 410-482-4367 on Thursday 20th of August 2009 09:51:48 PM