The product I used above for this article was Western Pacific Trading GTU from West Marine. Initially I thought it was the Gore GFO I had lying around but GFO has the words "GFO" written on the packing and after going through the photos carefully I could not find the silk screened GFO logo.
I had never had GFO fray but the GTU did. The photo to the left is Duramax Ultra-X which has a very similar construction and braid to Gore GFO. It does not fray when cut like GTU does. I would try to avoid the GTU packing sold at West Marine if you are concerned about the ends fraying.
Johnson Duramax Ultra-X can be purchased by the foot from Hamilton Maine and it cuts cleanly.