Here is a little clip showing the use of a hot knife on the backing of carpet. A question came up, "Will it work on natural fiber like it will on synthetic backing?" Yes, it will work but not the same. This tool is used for intricate work and other uses, just thought I would share a tool some may not be overly familiar with.
Notice it will cut and seal the edges but it is slower with the jute backing.

Hope this helps to just show another item useable in repair work.
SA
Notice it will cut and seal the edges but it is slower with the jute backing.
Hope this helps to just show another item useable in repair work.
SA