This 20.25" wide x 14.25" high oversized geode mold is a resin artists dream. This 3/4" deep mold gives you the ability to create large, and thick geodes to turn into functional art like serving trays, or unique display pieces. It can be used with wood and resin, concrete, plaster or solely resin. You can pour up to 3/4" thick, or for thinner pieces, simply pour less material into the mold.
The last mold you will ever need. Created just for makers, resin artists and wood workers, these time saving flexible yet durable silicone molds significantly cut down on the setup and demolding time usually involved with other molds. Silicone molds are superior to wood and tuck tape, and HDPE molds because:
They can be used with epoxy resin, resin and wood, concrete, plaster and more.
They never need assembled, or disassembled. Saving huge amounts of time.
The strength and flexibility of the molds allows you to insert and remove pieces of wood easily.
The corners and edges never need sealed.
When using wood, the wood stays in place, tight in the mold if you cut it 1/16" larger than the width of the mold. Preventing the need for clamps or weights.
The mold is heat resistant (within reason!), and wont damage when you are popping epoxy bubbles with a torch or heat gun.
The molds are reusable. However silicone molds do have a finite lifespan when used with epoxy resin, but getting 20-30+ castings out of the mold can be expected when they are properly cared for and a mold release spray is used.
Like HDPE, epoxy does not stick to silicone. However in rare cases where the epoxy hasn't fully set (and is still mildly tacky) it can be harder to remove, and potentially create pits or small tears inside the mold when your piece is pulled out. Thus, we recommend the use of mold release spray before each pour to increase the life of your mold. We use the 'MG Chemicals 8329 Non-Silicone Epoxy Mold Release', or Smooth On Ease Release™ 200 which is readily available on Amazon.