I was washing our 2013 Mountaineer yesterday and found several places where the caulk on top of the gutters was coming loose. It appears this seals the top of the gutters to the rubber roof, so it is touching the rubber roof membrane. I have a couple of questions. Should I try to remove all the caulking on top of the gutters or just the places that are coming loose and run a bead of caulk down the top of the whole gutter? Also, I have a tube of Dicor 501 self-leveling caulk, when using this on a vertical surface will this product sag? I'll be near a Camping World by Thursday and can get a different type of caulk.