Roof Radius Caulking Cracks

[creativepart]

I check my roof radius drip rail caulking once or twice a year. My motorhome is 6-years old now. So, I checked it today, again.

The caulking appears to be Manus Bond 75 - which is what WBGO says it is. I've used Manus Bond before on a small opening on the cap radius. So, I know what it looks like.

For just about the entire roof length the caulking looks OK. But the first 2 ft of drip rail, on both sides shows some cracking. Since it's both sides I'm guessing there is some flex up front and this is why it's only in this area.

Here are two photos of the "good" section and the "bad" section. I'm thinking I'll just remove some of the cracked caulking and reapply Manus Bond 75 to that 2' or so.

The filon roof radius is not even slightly loose. There is zero movement when pressed at the point the filon enters the drip rail.