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Raven · 03-26-2012, 12:51 AM

nope - you can spray with an algae- cide

it's for cement but it should work just as well on shingles

similar to using bleach i suppose but designed for it

03-26-2012, 12:51 AM	#11
Raven ........ iTrader: (0) Join Date: Apr 2002 Posts: 22,805 Blog Entries: 1	nope - you can spray with an algae- cide it's for cement but it should work just as well on shingles similar to using bleach i suppose but designed for it