Don't wrap, and don't put anything between them. Too long a story, too many misconceptions to unravel for me to try and explain. Just do this:
First figure out kind of a general way of dressing the wires that achieves a good balance between spacing, keeping signal away from power, and everything being off the floor. Also no kinks or coils. Finally, where wires do come close try and have them cross at sharp angles. Avoid having them run parallel.
Next, use Cable Elevators or ceramic insulators (same thing) to raise everything up off the floor. You can use other materials like plastic or wood, ceramic is just a little better.
If some wires are close that's okay. Electric fields attenuate with distance following the inverse square law. In effect this means doubling the distance from 1" to 2" is 1/4 the field strength. So even that small distance made a big difference. But by the time you get to a foot the field is so infinitesimally small its simply not worth the effort. So just avoid them touching and then don't stress.
Study mine for example, notice some are fairly close but almost none are touching. https://systems.audiogon.com/systems/8367
Finally, suspending everything will be better. The opposite of wrapping, you want all wires to be able to move freely. Rubber bands are free and handy. Its hard to see but the yellow bands on the cable elevator is stretched so that it suspends the cable above the ceramic insulator. If you touch the cable it will bounce slightly. That is what you want. This sounds loopy but is actually the biggest improvement of all.