Sulphur strips are used for the sanitizing of wine barrels. Hang a lighted sulfur strip in the barrel, placing the bung on very loosely. After about 5 minutes, remove the burnt sulfur strip and place bung in tightly.
NOTE: DO NOT BURN IN A USED WHISKEY OR SPIRITS BARREL. THIS COULD CAUSE THE BARREL TO EXPLODE LEADING TO INJURY OR DEATH.