Caulk for trim

[carmangel]

I was told to caulk the top of the trim around the bottom of my 1974 Globetrotter. Any suggestions on what kind of caulk to use?
Thanks

[CRH]

I like Parbond in aluminum color. I put on a fine bead, then use a mineral spirits soaked cloth to push it into the crack and wipe off the excess.

[CRH]

.....

[uncle_bob]

Hi

Silicone (RTV) caulk is normally the "best stuff" for most applications. The standard varieties give off acetic acid when they cure. That's not a good thing for a number of metals, aluminum being one of them. There are "Aluminum safe" flavors, good luck finding them at the Dollar General

Bob

[ventport]

I have found Parbond gets hard as a rock after a year or two, cracks and can fall off. I would use something else, unless you like re doing it every year.

[CRH]

I last appiled Parbond 3 years ago this summer. Mine is still in good shape.

[Bob Blarney]

I've never found silicone caulk or glue to be satisfactory in the long term except on glass and glass-like surfaces such as ceramic tile. It will also adhere well to stainless steel.

It should be noted that many if not all silicone RTV adhesives/caulks are almost transparent to water vapor, although they repel water droplets. This property leads to infiltration and eventual separation of the bond between the silicone and most substrates.