Gaffer's tape or an actual cable tube. You can buy either from a good hardware store. I k now you said no adhesive, but Gaffer Tape is safe to use on like anything. it's a strong but temporary adhesive meant to tape down cables and such without leaving damage.
LeWitchy t1_it9igfx wrote
Reply to Keeping an Ethernet cable flush against a hallway wall by [deleted]
Gaffer's tape or an actual cable tube. You can buy either from a good hardware store. I k now you said no adhesive, but Gaffer Tape is safe to use on like anything. it's a strong but temporary adhesive meant to tape down cables and such without leaving damage.