MAS UV Resistant?

Is the MAS expoxy supplied with the kits UV resistant?  Or is it expected that the varnish take care of that.

The MAS epoxy is not UV resistant; you need some type of UV-resistant coating, either paint or varnish to protect it from UV rays. 

I didn't think any epoxy was UV- resistant, but then I did this see this add from Systems Three for SB-112 epoxy-

http://www.systemthree.com/store/pc/SB-112-1-5-Gallon-Kit-12p26.htm

Anybody know this wouldn't be good for building all of our boats?

Hickory