I read that the chemicals they use are harmful to the finish on RV's but I've never used them. I just use a hose, a bucket with Murphy's Oil Soap and done it myself.
BTW: Dicor is not a roofing manufacturer, they are a wholesaler of other products. Alpha is one of their bigger ones they carry. They also resell BriteTek, which is what we have on ours.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '05 Odyssey