Butyl Tape vs Dicor Self Leveling

egarant wrote:
I am about to install a Fantastic Vent and replace the skylight over my shower.

The skylight manufacturer says specifically to use a butyl sealant that comes in a standard caulking gun size like the Dicor does.

This started me thinking, I used to use butyl tape for all seals on my older RV's.

Why can't I just use butyl tape under the new Fantastic Vent and be done with it? Butyl tape also doesn't react with rubber roofs at all.

Seems like less of a hassle and no re-sealing every year.

Your thoughts.

I also seal all fixtures with butyl first, screw down the fitting then
Dicor self levelling all around the outside edge.

I think a lot of leaking problems would be solved if the companies would to the same thing, all the sealants on the outside eventually crack and leak.