Thread: Stove preheating flammable gel...?

A good number of years ago, I watched a person preheat their stove using a flammable Gel as opposed to the regular process ....turn on fuel until wet, light, Wait for stove to heat then turn on fuel again.
The Gel was in a small toothpaste type tube.

It was much safer and controlled than the normal process.

Has anyone seen this gel and know what it is and where to get it?