Sealing and caulking - Help please.

[Native143]

I went to check my roof for hail damage yesterday and noticed that the caulk all around the roof seam is chalky and if I touch it, it just disintegrates in my fingers Yikes!! So I guess I need to remove and replace even though my AS is only two 1/2 years old and the dealer supposedly recaulked it when I bought it in Dec. 2014.

#1. Is this usual to deteriorate so quickly?
#2. How do I easily remove the old?
#3. What is best for the new?

I live in hot Florida. Lots of rain and exposure to the elements. I see lots of different opinions on what to use but I need easy and efficient.

Thanks a bunch. It's been pouring rain daily. No leaks seen yet.

[Jammer]

In general the visible part of the caulk is what will deteriorate and it is the part that matters least.

The roof seam is a lap seam and the caulk between the panels is what matters. It's probably fine. I would leave it alone unless there is a problem. You could find someone to test it with a sealtech machine if you are unsure of its condition.