cracks in fiberglas seams

[Adrian]

Last weekend we were washing and waxing the clipper and noticed that the seams from the cab to the fiberglas camper body are cracking. I also noticed the front seams are also cracking. Is this normal? Should I just lay some calk in the cracks and forget about it?
Thanks in advance for any advice
Adrian

[mollerus]

I noticed the same problem when I purchased my Clipper a couple of years ago.  That is just drying out of the caulk with 25+ years plus the constant working and flexing of the seams while on the road. The seams between the fiberglass panels up front can just be cleaned out well with a tooth brush and soap, rinsed and allowed to dry very well, and re caulcked without removing the old caulk.  I prefer butyl rubber caulk. Don't be surprised if you have to do this periodically.  The seam between the metal cab and the fiberglass is a different story.  I found that surface rust had developed on the cab metal under the calk so I removed the factory calk, sanded the metal, used a metal prep liquid to neutralize any remaining rust, repanted with primer and matching Rustoleum paint, then fianally re caulked the seams with butyl rubber.  If you don't stop the rust now it could eventually eat through the cab roof and your roof would look like the fenders on an East Coast car that has seen too many salty streets in the winters.  Bob