Casting resin in non resin molds – Using resin in non traditional molds

resin casting in non traditional resin moldsAs a part of my time in doing resin experiments, I took on the task to see about casting resin in non-resin molds such as a gelatin mold.  Even I was surprised at the results!

A couple of key points in the video:

1.  You must use a mold release.  I like the Ultralease epoxy resin mold release for helping me to get difficult castings out of the mold.

2.  If you are going to use the Ultralease mold release, a couple of light coats is plenty.  Do not saturate your mold.

3.  Once you use a food mold for resin (I used a gelatin mold in this video), do not use it for food again.

4.  Be prepared to ruin the mold.  Your resin may not demold, you may melt the mold, and who knows what else.  Know that you may have to trash everything!

Get more information about the supplies used in this video:

Ultralease mold release

Resin Obsession super clear resin

plastic resin mixing cups

Stir stix

And here’s the video in its entirety:



What has been your experience casting resin in non-resin molds?

Frustrated with your resin results?  You can stay on the same path of trial and error, or for the price of less than a resin kit, you can get a copy of Resin Fundamentals.   Stop making mistakes and instead learn the vital details you need to know to successfully craft with resin every time.  Buy the ebook now and read it today!

Unpublished Blog Posts of Resin Obsession, LLC © 2020 Resin Obsession, LLC

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22 thoughts on “Casting resin in non resin molds – Using resin in non traditional molds

  1. Great tutorial and I love how the pieces come out!
    “3. Once you use a food mold for resin (I used a gelatin mold in this video), do not use it for resin again.” I think you want to say “do not use it for food again” 🙂

  2. I use this mold and I just put the mold in the freezer for a few minutes and the resin pieces just pop right out . Love it !

  3. Hi, Katherine, I am a looong-time Sci-fi fan and love the way the Star Wars figures came out! It had my fingers itching to get out my paints!

  4. I think it’s amazing all the different things you can do with plastic molding. I think my niece and nephew would love these little moldings you did! Especially because the movie just came out; they absolutely loved it. We will have to try this with them. Thanks for the great idea!

  5. I wanted to make resin legs for a wood/resin nightstand top I made. .I like the shape of the 1 litter Sprite bottles for this, do you think I could let my resin cure in the bottles then simply cut my makeshift mold away after it does? I tried some reusable lasted bowls that shredded cheese came in and they worked super but I need something make more of a curvy leg shape for this project. any thoughts?

  6. You have me thinking of a project i want to do. Although i need adbise. I want to create a single 16″ x 24″ x 1″ thick clear epoxy casting that needs to be crsstal clear. Is there any premade molds i can purchase to creat this. Or any ideas of h ow to build one muself. I was thinking of melamine, I want to do some embellishments into this project.

      1. Thank you i am open to all info i can receive. I was thinking of melamine although hdpe may be better. Again thank you

        1. Hmm. Either way, you will need to coat it well with a mold release. The resin will stick to melamine and will likely stick to HDPE.

  7. Hi I wanted to know why doesnt anyone use silicon molds to make table tops out of epoxy resin. Like 4 x 2 ft table or round table. Ofcourse if the mold is available.

    1. Probably because it would take a lot of silicone (and expense) to make a mold that size. Plus, it would be rather heavy.

  8. I wanted to know if you can use a hair dryer instead of a heat gun for resin bubble popping? I have seen that they can be used for acrylic pouring on low setting. I just don’t want to have to go buy a heat gun until I try out a few things and see if resin is something I want to continue to do.

    1. Hi Kellie, it’s been my experience that the force of the air from a hairdryer pushes the resin around too much.

    2. Hi kellie you can always mist your molds after you pour them with rubbing alcohol to release the bubbles. I usually wait about 5 minutes after pouring my mold to give the bubbles time to rise to the top then I generously mist the mild and watch the bubbles pop. Hope that helps

  9. I love your tutorials -thank you for having this forum and such helpful resources for newbies! For molds that your art is clear or mostly clear, like the Star Wars example above, I love the clear resin with embedded bits of this or that but I feel as if the mold details are lost. Do you have any tips for making the details pop on a piece like that clear one above? I made some koi casts and love the effects of the iridescent glitter but unless you are very close to it the scales and other details are completely lost… any recommendations? Thanks in advance!

  10. Desperately searching for a way to either duplicate a metal cookie cutter or use a metal cookie cutter for epoxy projects. The cookie cutters are not available in silicone.

  11. I’ve used metal pie tins as molds with some success. I do not use a mold release because I’m pouring clear polyester resin and the release tends to leave a haze on the surface of the piece. I pour in layers (6 – 8) over several days and allow the peice to cure for 24 hours or more. I then throw it in the freezer for about 30 minutes, get it out and gently tap the back side of the tin with a rubber mallet to release the embedment.
    Just my 2 cents worth – thanks, Mike, Aurora Preserved Flowers.

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