NOTE.. in my case the Darco frayed damage was limited to the outer edges.. about 1 to two inches wide...
I measured the depth of the slide when extended and a 36" long piece x 2.5 inches width was what I needed to cover the outer edge on front and back of slide floor...
There is no damage anywhere else and the slide out is perfectly adjusted ( by me) ... ALso there is noting under the edge of the slide out such as a staple, screw, rock etc that caused the wear... It has been, after all 7 years of use..
I hunted around looking for black UHMW and of all places I looked this fella had just what I needed at a fair price.. I didnt need a full sheet of the stuff
https://www.ebay.com/itm/11320615491...75.c101224.m-1