What is material covering rudder cables on my I14T?

I need to replace the strip of material covering the rudder controls from steering handle back. Does anyone know what this material is and where I can buy more? Or if you don't know any ideas on what material can be used?

It doesn't look like heavy PVC like used in body of kayak. So far all I find on the net is PVC upholstery material which is not what I am looking for.

Also what type of adhesive should I use (Sta Bond etc).
tks