Caulking Seams & Joints?

Well, I have the same gel-coat over fiberglass set-up, and just finished caulking mine using GeoCel ProflexRV in white. It took me a bit to learn how to get best results...After a few false starts (tube end cut too large), I ended up applying masking tape am quite happy with the end result. Cutting the tube end small is best, and be rapid with tooling (knockdown) and tape removal since caulk sets rather quickly. I used a dab of mineral spirits on my fingertip for the initial knockdown, and again after tape removal to eliminate the raised edge lines. The key is to work quickly and minimize the number of knockdown attempts (I limited to two), since repeated knockdown will cause this fast drying caulk to look coarse and grainy...Done properly, caulk looks quite professional with hairline cracks (around cut-outs) now unseen.

Best Regards,

3 tons

dicor self leveling for roofs along with eternabond on front and rear seams for extra insurance, and regular dicor on vertical surfaces. I agree proflex is too hard to work with and does not smooth out well

Yes it is a regular maintenance issue and you should check regularly. If truly hairline crack without any gap at all it may or may not need to be recaulked. Use a caulk intended for RV use (Dicor or Proflex). Check the Camping World website.

geocel water shield. cheapest at rvwholesalers.com

Dicor makes two different products. Lap seal flows easily and is designed for roofs. The other one is for vertical surfaces. There is also a product called Proflex. People swear by it, but I tried it once and it took me about an hour to clean up the mess trying to do one short seam.