ajriding wrote:
no, Lap sealant is so sticky and gooey that as long as there is no obvious dirt, or a layer of skum it will stick. if you are happy with your soap and water cleaning job then you most likely have cleaned it good enough. I have never prepped a surface with special cleaners, maybe rubbing alcohol, but usually just car wash soap or just windex and it always seals.
He's not talking about lap sealant, he is putting some protectant layer over his whole roof.
OP, most of us have never wasted our time with anything like that. The Dicor roofing material lasts longer than your RV will. The only thing that NEEDS maintenance is your lap sealant/caulked seams. Anything else is just to make yourself feel better.
