Check with the manufacturer to see what material it's made from. It IS possible to bind epoxy to polyethylene, but you have to prepare the surface with a torch.
http://www.oldtowncanoe.com/pdfs/Dis...Repair_Kit.pdf
I don't know if I'd put this much effort into putting a kevlar pad on a kayak. On my Royalex/Oltonar (ABS laminate) canoe I generally just sand around the deep gouges, wipe with acetone and fill them with JB Weld epoxy. This might work on polyethylene if you do the torch treatment first.