> The rust protection for POR-15 is not affected by the sun.
> But the sun will change its appearance cosmetically from a
> glossy black to a matte black (and it can be an inconsistant
> matte black). That's they recommend you topcoat it.

We sell the "clear" version of POR-15. Actually it doesn't dry
completely clear, but close to it (it has a very slight tint).  Same
chemical composition other than lack of pigment. Perhaps a better choice
if for some reason you will not be top coating, and no downside even if
you will be.  Our part # is POR15.

- Ron Salmon
  The Bus Depot, Inc.
  www.busdepot.com
  (215)  234-VWVW

_____________________________________________
Toll-Free for Orders by PART # :  1-866-BUS-DEPOT