Question Has anyone added sleeves to PSU cables? Is it safe?

Is there any reason that I shouldn’t use these inside the computer?
Yes, I sleeved an old Seasonic PSU with exposed wires using Megamide. Easy enough to apply if you get the diameter right, otherwise it might get stuck on SATA or Molex connectors. It's easy to snag the open weave on sharp corners inside a computer case and snap a few strands. I've also used it to tidy up cable looms in 19 inch rack builds.