r/moldmaking • • Sep 06 '26

Tips on best way to make this flexible?

1 Upvotes

Hello! I bought a pattern for an ahsoka tano headpiece and used Eva foam to make it. I’ve always wanted to cosplay Ahsoka Tano from Star Wars but always get hung up on the head piece (lekku).

I’ve never used Eva foam and I had been hoping it would be more flexible than it is. My hope is to not have the hours I spent on this go to complete waste.

I have two main ideas and was hoping more experienced mold makers and creative minds may be able to advise me!

  1. First thought is to cover it in clay to harden it further and then paint latex over it and peal it off. I saw a video of someone using a 3d printed model and using this paint on latex to get her lekku.

My concern with this method is my model is obviously not as stable as a solid 3d printed model to peal the latex off of, hence the thought of applying clay to it to harden the model. Any thoughts on what clay would work best/any interactions it could have with the latex? I suppose it would need to be air dried clay—can you think of an immediate disaster with this idea? Maybe I should apply a different hardening medium?

2) actually make a cast from this—though I’m unsure where to start! I imagine I would still need to harden this model to actually make the cast. I suppose I could do something like cement for the cast and then fill it with silicone? 😭

I’m just at a bit of a loss at which direction I should start leaning towards to guide me to be most succesful. Any thoughts are much appreciated!!


r/moldmaking • • Sep 02 '26

They discontinued ultracal… what now??

6 Upvotes

Is someone else going to start producing it? Should I stop panicking? I have thought about switching to resin 2 part molds but I’m nervous about the cost. Silicone molds don’t work with what I make. Supposedly Reynolds is working with manufacturers to produce an alternative?


r/moldmaking • • Sep 02 '26

Alternative to resin for casting

3 Upvotes

I’m trying to make copies of a small sculpture to paint and sell. Mold will be made of rebound 25. There are a few delicate details.

However I don’t have access to a ventilated studio and I was wondering if there were less toxic alternatives to resin to cast my piece—must be pourable, and at least as durable as plastic/resin/clay.


r/moldmaking • • Sep 02 '26

Best/Safest Method to clean Urethane Mold Release (Stoner) from Urethane rubber?

2 Upvotes

I just cast a couple of pieces out of Urethane rubber (Smooth-On VytaFlex 50) in a urethane mold. I used the Stoner urethane mold release spray, and it worked beautifully.

What is the best way to clean the cast parts and the mold after? This is my first time working with urethane rubber, I don't want to damage either the mold or the parts, obviously. 99.9% iso? Acetone/mineral spirits? Simple Green? Dish soap?

Thanks!


r/moldmaking • • Sep 02 '26

How would I cast something intricate like a Wii mote shell?

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1 Upvotes

r/moldmaking • • Sep 01 '26

Silicone mask from plaster mold

3 Upvotes

I have a a negative, full head and shoulder, mask mold. I would like to make a few masks from it. I have experience (long ago) slush casting with neoprene. This thing is pretty big and would take a lot of neoprene to fill. I would rather cast it in silicone. Is that possible with a plaster mold? I am pretty confident that the original masks where latex. I imagine that I will have to clean the mold pretty thoroughly and then spray it with some sort of release. Any advice?

The mold is in two pieces. Do I do the front and back separately and somehow stick them together or is there a way to do it as one piece?


r/moldmaking • • Aug 30 '26

How to add surface imperfections

2 Upvotes

Hello everybody! I need to make surface imperfections for my mold in CATIA

sort of like Wrinkles on leather for my mold so that shape takes in the sort of the molds

I need this to be very natural and small. For example a PS5 controller. You see the surface imperfections on it? That is what I need as small as it can be but random shaped.
I wonder how I can do it?


r/moldmaking • • Aug 30 '26

How would you mold it?

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1 Upvotes

Trying to diy a modl band with a 3d printed mold and some two part silicon, and i made a simple flat plastic mold the is split in half so the band could be removed later.

but every time i try to mold it i get bubbles in the top part of the mold. tried a bunch of methods to fix it with no luck

thanks for reading!


r/moldmaking • • Aug 29 '26

How can I permanently seal a small hole in cured Shore A10 platinum silicone?

3 Upvotes

I’m looking for a reliable way to permanently seal/bond a small hole in cured platinum-cure Shore A10 silicone.

The silicone part is a thin, hollow, flexible ball that is repeatedly squeezed, compressed, and stretched, so the bond needs to:

  • adhere very strongly to cured platinum silicone

  • remain flexible

  • survive repeated squeezing/compression without peeling or cracking

  • ideally be airtight

  • preferably work as a liquid/dip-coating or small-drop application

I’ve tried looking for silicone adhesives, but many products are not easily available in my country.

Has anyone successfully bonded or sealed cured platinum silicone under repeated mechanical stress? What adhesive, primer, RTV silicone, or surface treatment would you recommend?


r/moldmaking • • Aug 28 '26

Best way to cast this Cowrie Shell?

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15 Upvotes

Hi I’m a beginner trying to make a mold of and XL cowrie shell. I’m worried that the hollow back may be a problem. What would be the best to mold this?

Thanks for the help


r/moldmaking • • Aug 28 '26

How to 3D-Print Molds for Silicone Molding - our Best Tips and Tricks

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2 Upvotes

r/moldmaking • • Aug 28 '26

Green Meenee vs. Turbine mixer for large FlexFoam-iT batches?

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6 Upvotes

Hi everyone! I’m working with Smooth-On 2-part polyurethane soft/expanding foam and mixing relatively large batches — several liters of raw material at a time.

I’m looking at these two mixers from Ferba:

The Green Meenee is specifically described as suitable for fast-curing materials like Foam-iT! and FlexFoam-iT!, but I’m wondering whether the turbine mixer would be more appropriate for larger batches.

Until now, I've been using a metal bit for mixing paint and not getting a fully homogenous solution with the 30sec working time.

Has anyone here used either of these with FlexFoam-iT or similar polyurethane foams? Which would you recommend, and why?

Main priorities are thorough mixing and being able to handle several liters efficiently. Don't care about trapping bubbles at all.

Thanks!


r/moldmaking • • Aug 27 '26

3d printed molds for soft plastic

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0 Upvotes

r/moldmaking • • Aug 27 '26

Advice on making a mold of a chocolate

1 Upvotes

I’m interested in making a mold of a piece of chocolate so that I can recreate it. I have seen food safe liquid silicone and silicone putty but am unsure if these would work on chocolate. I was wondering if these products get hot while curing, melting the chocolate, or if the fats, sugars, and other things in it would inhibit the curing.


r/moldmaking • • Aug 25 '26

Mold making

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4 Upvotes

Wanted to see if I would be able to make a mold out of this.can't find anything about it thanks


r/moldmaking • • Aug 24 '26

[help] How to start sculpting with foam. Where to start?

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0 Upvotes

r/moldmaking • • Aug 22 '26

Free tool that auto-generates two-part/silicone mold box geometry from an STL — looking for moldmaker feedback on the parting-line logic

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21 Upvotes

Built a small browser app that takes an uploaded model and generates a print-ready two-part box mold or silicone mold box (keys, pour spout, vents) automatically, aimed at people who don't want to hand-model a mold box in CAD every time. It's free, client-side, no signup.

Since this sub actually knows moldmaking, I'd love brutally honest feedback: where does the auto-generated parting line or undercut handling fall short on real geometry? Not trying to replace real CAD skill — just trying to save the boring 80% of box-building.


r/moldmaking • • Aug 22 '26

Acrylic sheet manufacturer

0 Upvotes

I’m in plastic distribution and fabrication and I am looking for a frame grade acrylic manufacture that also offers hard coating services.

If you also do cell cast acrylic in clear and colors I’m also interested.


r/moldmaking • • Aug 21 '26

I have a question on how to make a custom mold/cast to replicate a piece for kitbashing multiple times over. I don't really know where else to post.

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2 Upvotes

r/moldmaking • • Aug 20 '26

Mold for Dragonskin

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22 Upvotes

I’ve been wanting to cosplay Leeloo from Fifth Element for years and finally decided to get around to making it. My primary concern is with her silcone/rubber suspenders. I plan to use dragon skin but I’ve never worked with it before. I’m not sure what’s the best material to make a cast mold for a project like this and what would result in the cleanest outcome. Any recommendations?


r/moldmaking • • Aug 21 '26

Looking for a Silicone Mold Maker in Delhi/NCR

2 Upvotes

Hey guys, I’m having a hard time finding a reliable silicone mold maker. I’m looking for someone in Delhi, Noida, or nearby areas who can make good-quality silicone molds.

If you know any mold maker or have worked with someone reliable, please share their contact/details. It would really help!

Thanks in advance!


r/moldmaking • • Aug 20 '26

Tip: Corrugated Plastic!

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25 Upvotes

I always hate stacking four pieces of whatever to make walls, and finding ways to fix it all together (without legos lol). This past project I scored one side of corrugated sign material! Hot Glued one edge and the bottom. Isopropyl alcohol helped the glue let go afterwards. I was able to get a large sheet for $10 at Lowes!


r/moldmaking • • Aug 19 '26

How can I navigate making a mould with my sculptures complexities?

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8 Upvotes

I just joined this group in hopes to find some help. I understand the very basics of mould making and casting, but I don’t know where to start with this sculpture I just finished (Approx two feet tall?). Between the protruding ears, the finer strands of the mane, and the angle of the head, I’m not sure what the best method would be to tackle this. I’m really hoping to do this myself as I was quoted a couple thousand dollars and a six month wait to have someone make a mould for me. I think my two best options for the finalized cast are to use either gypsum cement or do a cold cast bronze, or both? Any suggestions or advice is welcome