Silver sulfadine.

Two years ago, idiot me was out at what I THOUGHT was a long-dead burn pit. I had a gas can with a small amount of stale gas in it, a huge pile of brush to burn....
So I was pouring the old gas out of the plastic can, and (you guessed it), WHOOSH-BOOOOOOM. My left shoulder, down my back and up to my hair were on fire, I dropped, rolled and rolled (right over some wild rose, as it turns out), and ran into the house fully dressed and got into the shower.
I had pretty bad burns, the skin came off in sheets, so I drove myself to the doctor's office. They cleaned the would and then gave me this tub of Silver Sulfadene.
I kid you not, I was able to use my arms and shoulder the next day, and in two weeks, the skin, pink and new, had grown back. I have slight scarring, it was only a 2nd degree burn, but that stuff was amazing. That's an A#1 part of ALL my first aid kids, LTS kits and so forth.

It's an old sulfer drug compound, modernized to a degree, but basiclly the same stuff as used in WW 1

it felt GOOD to rub on the burn. It was cool, it was soothing, it was not cold and shocking.