Bobbo wrote:
Don't use silicone. Ever. If you ever have to work on it again, nothing will stick where you used silicone, even more silicone. Get a good exterior non-silicone sealant.
Dupont 4200 is a very good choice. Be careful though, the Dupont 5200 is permanent. Really, really permanent.
There is also Dicor. It comes in two flavors, self-leveling and non-self-leveling. Self-leveling is good for horizontal surfaces, like on top of roofs. The non-self-leveling is good for vertical surfaces, like walls.
BTW, the "grey putty tape" is called butyl tape.
