Our new aluminum allow bath bomb molds make it easy to make round bath bombs that stick together. If you've ever found yourself cursing at trying to make bath bomb balls, give these molds a try and you might be impressed with your skills! How to use: Step 1: Fill each half of your dome molds with the ingredients mixtures until it's just overflowing a little. Step 2: Press the two sides together and use a decent amount of pressure to compact the mixture firmly into the molds, to prevent cracking. Step 3: Dust away the excess mixtures around the molds. Step 4: Gently tap slightly around the molds. Step 5: Gently remove one side of the mold, then gently invert the bath bomb so the uncovered side is facing down, then gently remove the other half of the mold from the top. Step 6: Place your bomb into half of a plastic bath bomb mold (to avoid a flat side) and allow to harden for 24 hours. Step 7: When bomb is completely hard, package to keep moisture and humidity out or use right away. NOTE: DO NOT bang the molds with metal spoon as they will dent easily. Do not wash molds in the dishwasher as they will discolor. Have fun!