I used this coating, and it did not drip.
http://www.epdmcoatings.com/rv-roof-repair.phpWatch the video clip. It is actually pretty easy. I bought and used a white tyvec suit from Home Depot to protect my clothes, but found that working in shorts was much cooler. You will need chemical resistant rubber gloves to keep it off your skin, but it done not burn, and will come off with water and a little soap and time.
I poured it on and spread it around with a 4" paint brush, and used a coffee cup that I bought at a garage sale for a dime. This scooped it out, and placed a little at a time where I wanted it.
I bought 5 gallons thinking it would do the whole thing, but only went about 1/2 way. Another 5 gallons arrived, and I finished the project with a gallon left over, that I put in the freezer for 6 months. It was still good to repair the sidewall leaks on another RV the next May.
Good luck,
Fred.