How To Cast Anything With This Two Ingredient Mold

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Sometimes it’s just fun to play around and create for the pure joy of it — case in point this little concrete pear. When our blog was MIA a few weeks ago, I went into a total downer. And when this girl gets down, she goes shopping for food. Does anyone else do that? So while walking around our local store, I spied a plump, little green pear with the cutest butt ever. Weird, I know. If I’m not feeling up tin cans to make a washing board, I’m checking out the butts on pears 😀  Anyways she came home with me and rather than chopping her up for a fruit salad, I decided to make a “two ingredient” mold, and immortalize her as a paper weight instead.

Kinda cute right?!!! She’s been drizzled with a rich copper paint sauce. If I ever master the art of cooking I’d love to make a baked pear dish with a drizzle of sauce. It looks like something that could be served in a 5-star restaurant. Okay, maybe not 😉 So since the only recipes I know how to follow are those that involve a strange mix of ingredients, let me share how to make a silicone mould or mold, using only two ingredients that can be used to cast almost anything.

But, before we get to the tutorial, be sure to follow us on Facebook, Twitter, Pinterest, Instagram, and hit that subscribe button below, so you never miss a post.

Right, let’s get to the tutorial. It’s easy, fun, and will open up sooooooo many new crafting possibilities.

Two Ingredient Casting Mold

• Silicone – the cheap stuff that smells like vinegar works best
• Maizena or cornstarch

If you can’t find cornstarch or you’re allergic, you can use tapioca starch or rice flour.

The Other Stuff

• Whatever you want to mold. I used my shapely pear 😉
• Plastic knife for mixing
• Mixing container
• Caulking gun
• Sharp knife
• Super Glue
• Gloves

How to Make a 2-Ingredient Silicone Mold

Prepping the Form for Molding

Wash and dry the pear, or whatever you decide to cast. Since I’ll be filling the mold with concrete once it’s dry, I stuck a pen lid into the bottom of the pear. It helps keep the pear upright while the mold sets and will leave a hole that’s the right size for pouring in the concrete mix later.

See what I mean about the cute pear butt 😉 I stuck the pen lid into a bit of polystyrene before mixing up the mold. It’s a trick I learned when painting polystyrene balls.

Mixing the Two Ingredient Mold

Put your gloves on and throw some cornstarch into a container. Cut the tip of the silicone tube off and put it inside the caulking gun. Squeeze silicone into the cornstarch. Roughly the same amount. Then add some more cornstarch on top of the silicone and mix. If you’re using your hands, wear gloves. Things get very sticky. You can also mix the two ingredients in a plastic bag to limit the mess. Oh, and it’s probably best to do this outside. Cheap silicone has an incredibly strong vinegary smell.

When it looks like it’s almost mixed, start kneading the mixture until it forms a stiff paste that resembles playdough. If the mixture is too tacky or sticky, add some more cornstarch. If it’s too dry and flaky, like in the piccy below, add more silicone.

Molding an Object

Once it’s ready, flatten it out a bit and wrap it around the shape you want to cast. About 7 to 10 mm thick is perfect. That’s about 1/4” to 3/8”. Make sure you squish it into all the nooks and crannies.

Sit back and wait for it to dry, probably about ½ hour depending on the silicone you used. Use a sharp knife to cut the mold and remove your form.

The two ingredient mold is very pliable so you can just peel it off. If you’re molding a pear, please don’t eat it. Rather wash it off again and add it to the compost heap.

The mold captures details beautifully and depending on how thick it was applied holds its shape really well.

Use super glue and carefully glue the two halves back together again, and it’s ready for casting.

Casting the two ingredient mold

You can either use concrete or plaster of Paris. I didn’t have to add any kind of release agent, I simply mixed up some concrete and poured it inside the mold. Just make sure you shake it around a little to get rid of any air bubbles. Once the concrete sets, carefully cut along the seam lines and remove your form.

This easy two ingredient mold can be reused over and over again, just wash it off, and you’re good to go.

To finish the pear off, I used some copper paint to create that 5-star restaurant look and added a bent, rusty nail as a stalk. The leaf is a piece of metal that had been lying outside in the rain for a few months.

A little bit of rust always works for me.

Don’t you just love that combination of concrete, copper, and rust?

Just a word of warning. Once you make your first mold, everything looks moldable 😀 We’ve turned an old broken doll into a garden ornament, transformed a bell pepper into an colorful jewel, and even created our own Egyptian cartouche using the two-ingredient mold. And since the mold is silicone-based you can use it to make candles too. Even teeny, tiny ones.

And if you like the idea of making your own silicone mold, don’t forget to save it to Pinterest so that you can find it again!

Let me know what you think. What would you mold?

Oh and if you don’t want to go to all that trouble and find some of the materials we used, we’ve got you covered. Disclosure: If you click on the links below, we may receive a commission from Amazon. But don’t worry it won’t come out of your pocket, and it helps us come up with more unique DIY and craft tutorials to share with you  😉

Or if you prefer to buy rather than DIY then perhaps these beauties will appeal.

And as always hope you have a wonderful week, filled with love and lots of interesting new finds. Thank you for popping in for a visit.

Last update on 2026-08-16 / Source Amazon Affiliates