In a double boiler, gently melt the tallow and beeswax.
3 ounces beeswax, 2 ounces tallow
Add the avocado oil and stir to combine.
1 ounce avocado oil
Slowly pour the mixture into the silicone molds, and let them sit at room temperature until they're completely cooled and solid. This usually takes a few hours, but the time can vary depending on the temperature of your home.
Gently remove the bars from the mold and use to season and oil your cast iron.