Skip to content


8x6.4x3.1" Small Arch Shaped Silicone Mold For Epoxy Resin - Deep Casting Mold

Original price $104 USD - Original price $104 USD
Original price $104 USD
$104 USD
$104 USD - $104 USD
Current price $104 USD

Interior Size: 8x6.4x3.1"
Fluid Volume:
86oz / 2543ml
Wall Thickness: 5/8"
Material: Platinum Cure Silicone - Shore 30A
Interior Finish: Polished / Shiny

This 8x6.4x3.1" arch shaped block mold is perfect for casting items such as flowers, rocks, and other memorabilia into resin up to 3.1" thick. We design our deep pour casting molds with extra thick silicone walls for dimensional stability, and at just over 3" in depth you can cast true 3" thick pieces in these molds.

Arched shaped deep pour molds are perfect for casting larger bouquets and dried wedding flowers in resin, with the shape reminiscent of arches found in church architecture.

Note that due to the stiffness of the silicone, demolding a piece of this height can be challenging. There are two ways to remove castings from this mold as peeling back the mold significantly will likely result in tearing.

1. Pouring distilled water between the cured resin piece and the interior wall of the mold and moving the water around the resin casting before trying to attempt to remove it from the mold. 

2. Using a compressed air hose with a soft (plastic or rubber) gun nozzle end. Insert your air gun in between the casting and the mold wall and scale up the air flow rate until the casting rises from the mold.

Crafted Elements Silicone Molds

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, Jesmonite, 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. Alternatively use our HDPE block kit in conjunction with hand weights or clamps to keep your wood from up in your resin. The HDPE blocks dont stick to set resin and are easily and cleanly removed.
  • The mold is heat resistant to ~450F. Avoid direct contact with the flame of a torch. Briskly wave your torch or use a heat gun to pop bubbles.
  • 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 non-silicone based mold release spray is used.
  • Like HDPE, epoxy resin does not stick to silicone. However, the heat generated by the exothermic reaction and the chemicals in epoxy resin are very harsh to all silicone molds. Additionally, if part of your epoxy has not fully set due to improper mixing, the epoxy can become bonded to the mold. Both of these factors can lead to mold tear out when removing your piece from the mold, leading to pits and tears on the surface of the mold. This is why we a non-silicone based mold release spray is required before each pour. To help prevent tear out and to increase the life of your mold. We use the 'MG Chemicals 8329 Non-Silicone Epoxy Mold Release', 'Mann Ease Release 200' or 'Mann Ease Release 300'. Cooking spray, vaseline, silicone based sprays or sprays designed for urethane or polyester products should NEVER be used. Using a proper, non-silicone based mold release can mean the difference between getting only a couple of uses from your mold to 20, 30 or more.
  • Mold Instructions & Care - Click Here