Lap sealant maintenance

We've had our Rockwood 2607 for a year and a half and I'm getting ready to touch up the lap sealant on the roof as it is starting to crack a little.

Thats what I've done with my '97 5ers rubber roof and never a leak.
If its a hair line crack in the sealant I add just a bit of self leveling Dicor to the crack....if the OEM sealant is loose or the edges lifting I pull it off but don't disturb whats still working. Then recaulk that spot.

Best info is use a product your trailer mfg or roof material recommends as the use of some products can and has voided the units roof warranty. A area FR dealer can have that info for you.