Well, not even Fine RVing much less Fine Homebuilding, but I need to replace the crank up vent in the ceiling of my old RV. I may want to replace the vent with an a/c unit in the future, so while I don’t want the vent to leak, I don’t want to make it too difficult to remove at some point. The vent is a standard 14″x14″ crank up vent with a sheet metal flange about 1 1/2″ that is secured to the metal RV roof with screws. The existing sealant appears to be some type of rubberized material that formed a layer about 1/8″ thick and never leaked but peeled off from the painted metal flange fairly easily.
I have tubes of clear silicon caulk as well as the siliconized acrylic caulk but I am wondering if these will adhere more tightly than I might want.
(Oh, and the RV is an old Toyota based Dolphin that is pretty gutless 4 banger which gets about 17+ mpg – but which almost comes to a standstill when trying to drive into the Columbia Gorge winds…)