Originally Posted by Journalist
About six or seven years ago, Vulkem was used to reseal a few pieces on the roof of my AS. Much of the 40-year-old original stuff is still on the trailer and going srong with no leaks. However, the newer stuff is drying up and rotting away at an alarming rate from sun exposure. I don't remember exactly which Vulkem product was used, but it was recommended to me by Jackson Center when I called to ask what I needed. Anyone else had this problem? I made the natural assumption that when I used the stuff recommended by the factory that it would hold up on par with the original sealer.
Vulkem sealer easily lasts and bonds for decade.
it must bond to a good surface.
Applying Vulkem over the clearcoat on your Airstream, does not provide a good surface for the sealer to bond to. In fact, that's a very poor surface.
The factory appliied Vulkem sealer, before they clearcoated the trailer.
With today's clearcoat, no problem. With the older clearcoat, big problem, as the paint itself only lasts about 5 years, and then starts to peel off, without any assistance from anything else, except the sun.