Like JD MT, I have used sawdust to great success.
Thin layer of ground charcoal briquettes seem to work nicely also.
I think it works as an insulator to keep the temp more even and reduces the tin oxidation also.
Unlike most folks I cut my sprues right back into the pot.
Seems everybody has their "special way.
For normal fluxing it is plain old candle wax.
Doesn't borax cause rusting of the pot in humid climes?
Last edited by LouisB; 02/05/21.
