If you search the forum you'll find lots of testimonials about rv liquid rubber. There are several brands that really are liquid rubber. It is used by a lot of commercial roofers.
Unlike most folks here I'm too lazy to re-caulk and re-coat every few years. I had damage to a Class A years ago because 3 year old caulking failed over the winter. I wanted a solution I wouldn't have to touch or worry about for 20 years.
I used Eternabond tape around the sides and vents then this brand over it. Took 4 hours on a 30' RV. I still wash and check the roof twice a year but 8 years later no recoating and no caulking required. My only complaint is fallen leaves over the winter did stain it. But otherwise like new.
I should have taped over the screws in the end caps. A screw worked out and caused a small leak 1 1/2 years ago. I had to cut it to get to a carpenter ant invasion and it was as flexible as the day I put it on. I just sealed up the cut edges with Eternabond. And taped over the d!$@ screws.
Eternabond and Liquid Rubber sticks to almost anything, even bare wood, and should last over 20 years. It is initially more expensive than cheaper coatings but it is overall cheaper than re-coating every few years. Plus my time is worth something. If you decide to go this route I bought the recommended 5 gallons but only needed 3 1/2 for a 30' roof.
Unlike most folks here I'm too lazy to re-caulk and re-coat every few years. I had damage to a Class A years ago because 3 year old caulking failed over the winter. I wanted a solution I wouldn't have to touch or worry about for 20 years.
I used Eternabond tape around the sides and vents then this brand over it. Took 4 hours on a 30' RV. I still wash and check the roof twice a year but 8 years later no recoating and no caulking required. My only complaint is fallen leaves over the winter did stain it. But otherwise like new.
I should have taped over the screws in the end caps. A screw worked out and caused a small leak 1 1/2 years ago. I had to cut it to get to a carpenter ant invasion and it was as flexible as the day I put it on. I just sealed up the cut edges with Eternabond. And taped over the d!$@ screws.
Eternabond and Liquid Rubber sticks to almost anything, even bare wood, and should last over 20 years. It is initially more expensive than cheaper coatings but it is overall cheaper than re-coating every few years. Plus my time is worth something. If you decide to go this route I bought the recommended 5 gallons but only needed 3 1/2 for a 30' roof.