I have beeb doing all kinds or searching/researching about what to do. We have you guessed it a leak in the cab over of our 1997 Class C Coachmen motorhome. After gutting the cab over looks like the leak is a mix of the cab marker lights, roof vent, and maybe the seam where the rubber roof is held down at the front. Glad I caught it early and we have a place to keep it inside.
Now trying to plan my attack to fix it. Torn between just using something like FloSeal, Pro-Flex, or Dicor sealant to re-do the cracked existing sealant on the vents and stuff. Or do I use somthing like lquid roof. I am hestiant to use a product that coats the whole room since its a seamless roof and in great condition no tears or past repairs.
Stay away from products that coat the entire roof. Makes finding future leaks really hard and you are sealing areas not needed. Get as much of the old caulk off the entire roof including marker lites. Clean surface and recaulk. There are probley other leaks you have not yet found. I suggest a pressure test upon completion to be sure. Might also want to hose down the roof and check for low spots where water can sit. May need to shim around openings to raise them up. Best of luck.
Wonderful wife & 4 Really Fun kids
2008 KIA Sedona 3.8L 24 valve V-6
2001 Bantam Trail Lite B-19
I have used tubes of Dicor on the penetrations and edges of my rubber roof with good results. It comes in regular, which will stack a bit where necessary, and self-leveling, which seeps and flows into seams, etc.