I have unfinished attic space that I used for storage. I have a plywood floor up there, and there's romex running along the floor.

I want to protect the romex from people walking on it / stuff leaning or rubbing on it/ etc.

Does anybody have any suggestions about what to use? It needs to be something that I put right over it, and staple down to the plywood so conduit it not going to work. I thought about using some wire moulding but it's kinda expensive and I need about 30 feet of it.

Is there some rubber product that would work in this application?