Best Caulk for Sealing Exterior Seams??

[Dave1]

We have an older park model trailer (1989) and some of the exterior sheet metal seams have cracked with age and movement. I want to go over the entire unit and caulk/seal everything to prevent leaks. What is the best type of caulk to use for such an application?

We are in Florida where there can be a significant temperture swing from day/night. Contraction and expansion of the home and materials would probably dictate the need for a flexible type caulk.

3M 5200 is undoubedly the strongest marine grade caulk/sealant but is not very flexible and cannot be removed later.

What do you suggest?

Thanks, Dave

[Brenda (OH)]

you might look at the geocel caulks... flexible, paintable, not removable though.... they have a website. I have used the clear one around windows, it seems strong.

why would you want to be able to remove the caulk?

Brenda (OH)

[flcruising]

White Lightening is my caulk of choice. I purchase at Lowe's.

If the gaps you're filling are over about 3/8-1/2" in width, push some foam backer rod into the joint before caulking.

[Dean3]

I would use an acrylic/silicone blend that is also paintable and rated for outdoor use. Whatever you do don't use some $1 per tube "painter's caulk",that stuff is usually just a cheap latex that dries hard and cracks 1st chance it gets. Seems like every year they come up with something better though,my idea might be out of date.