Puzzled
As a child, ours was a bit like a stick of sealing wax, but yellowish, so was hot when applied. But it worked!
Can't remember the name!
Have used Magnesium Sulphate fairly recently to remove a metal splinter, instead of the usual needle and tweezers.
I wonder if you are remembering Bate's Salve? Both my Mum and Granny had a stick of this. Always a clumsy child I had frequent cut hands and knees which would get them rushing to the biscuit tin that held old sheeting torn into bandages and this dreaded Bate's Salve. The stick was held over a lit match and the hot drips were collected on a piece of bandage. While it was still hot it was slapped on my cut with me protesting loudly. It did the trick though and I don't remember any cuts going septic. Don't think it's available any more. It's probably an exhibit in the Chamber of Horrors.