How to Use Silicone Caulking in a Mold

Silicone caulk is a good choice since it's flexible and does not stick to the molded object. One hundred percent silicone caulk is often much cheaper than commercially produced products. A rigid mold is required for silicone caulk, and porous material will need a mold release agent.

Things You'll Need

• Caulk gun
• Scissors
• Mold release agent

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Instructions

1. • 1

     Apply the mold release agent to the interior mold if using porous material.

   • 2

     Cut off the tip of the silicone caulk tube with scissors. Place the tube in the caulk gun.

   • 3

     Squeeze a bead of caulk into the mold. Use your fingers to brush the silicone into the surface. Apply more caulk until the surface is filled.

   • 4

     Allow the silicone to dry for at least 36 hours.