Re: RV Goop
HI I have spent 30 some years in the roofing trades and have sealed zillions of leaks and still do.
The RV goop mentioned may work I never used it, but I see it comes in 3.7 ounce tubes, which I would not find practical for large applications.
What works for me, is this. NEVER USE THIS on RUBBER-epdm!
Is a product called Quad polymer by OSI. Home depot often carries it in 3 colors white-clear-terratone(real dark brown). I don't like to use clear because of UV degradation. I buy at ABC supply a national roofing supply and it come in over 400 colors so I use it for detailing and eye-browing windows. I also use $20 dollar skeleton caulk guns that have good release/triggers so it stops when done.
You do not want to get this stuff on any clothing you cherish!!!!!!!!!!!! Keep a bag of rags handy- and it is mineral spirit clean up.
RAIN can come 5 minutes after application and no sweat. 10 ounce caulk tubes are about $7.