Place your hardened tallow into a stock pot or slow cooker over very low heat. Allow it to become a clear liquid—avoid high temperatures to prevent scorching. Low, steady heat is key for best results.
For every 2 cups (400–420 g) of melted tallow, add 1 cup of hot water and 1 tablespoon (18 g) of salt. The salt draws out any remaining impurities, bits of meat, or cloudy residue.
Stir gently, then remove from the heat. Allow the mixture to cool at room temperature until the tallow solidifies on top. You’ll see the impurities and dark particles settle at the bottom of the pot.
Once hardened, lift the purified tallow layer off the top. Discard the dirty water below. If you want an ultra-pure finish (for skincare or soapmaking), repeat this process one or two more times with fresh water and salt. Then, melt the purified tallow once more and pour it through a coffee filter or fine mesh strainer into a clean, dry container. This removes the tiniest remaining bits and gives you that smooth, creamy texture perfect for whipping into balm.
Once the tallow has been strained, pour it into molds for later use or proceed with making tallow lip balm or whipped tallow balm.