Just be careful using these roof coatings. Henry's makes two types, Silicone and Acrylic. The acrylic roof coating works best on standard membrane RV roofs like EPDM or TPO. The silicone is best for fiberglass, metal or bare wood roofs. Sadly the more expensive silicone won't last as long as the less expensive acrylic when applied to rubber roofs. This is the main reason so many complain that silicone roofs fail. It's not that the silicone roof is bad, just the wrong product was used. Likewise, the less expensive acrylic roof coating won't last as long as the silicone when dealing with hard roof surfaces like metal, fiberglass or even bare wood.
So, if you have a membrane roof, save the money and buy the less expensive acrylic as the silicone won't hold up much longer than the acrylic on those roof. If you have a hard roof, metal, fiberglass, wood, etc., definitely go with the silicone.
1994 Itasca SunDancer 21RB - Chevy G-30 chassis.