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Casting Material Options

ComposiMold and ImPRESSive Putty work with a LOT of casting materials. We do our best to keep track of all the innovative materials with the hope of providing you tips for the variety of casting materials you can use. Click a casting material option to learn more. If you have a casting material that you don't see here, please ask us.

epoxies-word.jpg bondo-word.jpg butter-word.jpg chocolate-word.jpg clay-word.jpg concrete-word.jpg cookie-word.jpg composicast.jpg composistone.jpg crayon-word-2.jpg  encaustics-word.jpg epoxy-putty-word.jpg fondant-word.jpg hot-glue-word.jpg jello.jpg lowmelt-metals.jpg moldable-plastic.jpg paper-mache.jpg plaster.jpg polymer-clay.jpg silicone.jpg soap-cars.jpg urethane.jpg wax.jpg

Acrylic resin, Epoxy, ComposiCast, Resin 

Acrylic and epoxy resins are excellent casting materials for ComposiMold and ImPRESSive Putty. Our ComposiCast is an epoxy resin formulated specifically for ComposiMold mold making materials. Most pourable acrylic resins are typically just clear epoxies. Epoxies work well for pieces up to 5 cubic inches. For larger castings of 5+ cubic inches, choose epoxies with longer cure times of 24+ hours. Experiment with freezing the mold prior to pouring epoxy resins that create a lot of heat during curing. Epoxy resins that require an added heat source for curing are not recommended. ComposiCast White, Black and Clear Casting Plastic are epoxies designed for use with ComposiMold and ImPRESSive Putty.

  

Many more videos on using resins are available on our YouTube Channel

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Bondo and Other Polyester Putties:

Bondo smells and it's unhealthy. But it is relatively inexpensive and you can find it at most hardware stores. Be sure to use it in a very well ventilated area and wear gloves. Bondo works excellent for mold making and casting in both the ComposiMold and ImPRESSive Putty. Larger pieces (depending on shape of about 3 solid cubic inches) will create quite a bit of heat and can melt ComposiMold so chill the mold prior to pushing in the Bondo casting material. ImPRESSive Putty can handle larger sizes because of its higher melting temperature (175 F vs. 135 F for ComposiMold).

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Butter: 

You can make a butter mold from lots of different objects. The mold making process is simple, and with ComposiMold-Flex the molds are easily removed from the butter. 

TIPS for Butter Mold Making: We recommend ComposiMold-Flex for butter molds because the butter is soft and the flexibility of the Flex mold allows you to bend the mold around your butter. Chill the butter before pulling it out of the ComposiMold mold so it is firmer.

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Chocolate:

Turn almost any object into Chocolate using a Food Contact Safe Re-usable Mold Making Material. With just one product, you can make dozens of molds.  Pour or pipe many types of melted chocolate into your mold. Lightly tap or vibrate the mold to release air bubbles in the chocolate. No mold release is necessary for chocolates.  Watch some of these videos to see the process  in action.

   

The chocolate mold making process is great for decorate wedding cakes and birthday cakes with custom milk chocolate and fondant shapes. With ComposiMold, you can easily make your own chocolate molds instead of trying to find a plastic mold or using silicone molds that can only be used for one design. Unlike silicone molds that can only be made into one mold, ComposiMold can be re-melted and re-used to make dozens of unique chocolate molds. It is certified safe for food contact mold making applications. 

Making a ComposiMold Candy Mold for Chocolate: 
To make your first mold, start with a simple shape: something with one flat side. Melt the ComposiMold in the microwave and pour it over your object. Let it solidify or place it in the freezer for 30 minutes until the rubber mold is solidified. Pull out your original shape, and pour in your chocolate. The tips below will set you up for success when making chocolates for your cakes, cupcakes, or sugar treats. 

  • Make your chocolate molds quickly and easily by melting the ComposiMold in your microwave. A double boiler or a chocolate melter also works great for melting ComposiMold.
  • You do not need to cool or freeze your mold for chocolate castings because chocolate should never be above 100 F.
  • When you are making your mold, lightly coat your original shape with a food safe mold release such as vegetable oil. When casting chocolate, you typically do not need a mold release.
  • Pour the melted chocolate into your unique mold using a spoon, stick, or brush to fill the mold. Tap the bottom and sides to get air bubbles out of the chocolate. You may also like using a squeeze bottle or small piping bag to push the chocolate into small openings and crevices.
  • To solidify the chocolate castings, cool the chocolate in the mold by placing it in the refrigerator or freezer.
  • De-Mold your chocolate by peeling the mold away from the delicious chocolate treat as much as possible so you don't put a lot of pressure on the chocolate.
  • Enjoy your one of a kind custom chocolate castings. Don't forget: When you have made all the chocolate casts that you want with one mold, you can be remelt your mold to make over 35 other shapes.

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Clays:  

Clay and air dry clay can be pressed into ComposiMold or ImPRESSive Putty. Because ComposiMold and ImPRESSive Putty are biodegradable, they cannot be used with slip casting.  Do not use clay in a slurry form or the water will degrade the mold. ComposiMold-Firm and ImPRESSive Putty are excellent for stamping into the clay.  The re-usability enables you to make a unique shape when necessary.

You may also be interested in reading about the Polymer Clay mold making.

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Concrete and Cement:

If you want to make unique concrete molds, ComposiMold can help. Make your own unique concrete molds and re-use to make new molds. Just by re-melting, you can keep on making new molds: for counter tops, garden sculpture, rock walls, fireplaces, concrete stamping, and so much more.

 
 
 

Advantages of ComposiMold for your Concrete molds:

  1. Allows you to make new molds anytime you want
  2. Great detail, easy to make molds of almost anything
  3. Re-usable! No waste!
Disadvantages of ComposiMold molds:
  • The mold will need to be re-made after 3 to 8 casts in it (simple molds can be used longer). Use a mold release to extend mold life.
  • Slow curing concretes require the concrete/water mixture to sit in the mold for a long time. The moisture may begin to degrade the mold. Choose a quick curing concrete to avoid this.
Making a ComposiMold for Your Concrete Creation: Follow the basic instructions to make a mold with ComposiMold. The process is simple. Melt the ComposiMold in a double boiler or microwave. 
 
concrete tile, cement mold, pre-cast concrete molds,  concrete tile, cement mold, pre-cast concrete molds,


 
 
Applying a mold release (or release agent) will allow your model to be easily separated from the ComposiMold. Applying a mold release to the mold before casting will also minimizes wear and tear on the mold. This is important if you are using the mold to make many reproductions.
 
Wipe off the mold release after to make sure you do not have too much. You can also use a clean paint brush or cloth to brush the release agent over the surface of the model and surrounding forms. Make sure that intricate detail, undercuts, and hard to reach areas are coated as thoroughly as possible. 




Concrete Castings made with ComposiMold Mold Making Materials Concrete Castings made with ComposiMold Mold Making Materials
This bird and welcome sign, pictured on the left, was cast with concrete with red concrete coloring added. The turtle, on the right, used Quickcrete rapid curing concrete. Below is a video showing how to make a concrete statue.

 


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Cookie or Cookie Dough Shapes

Custom cookies and cupcakes are all the rage! Entire businesses are built on people's love for these small, sweet treats. With the right cookie dough recipe, specifically one that doesn't rise while baking, you can make any cookie shape you want. And with ComposiMold, you won't be limited by pre-made cookie cutter shapes that are available in your supply store.

 1. Choose a found object with the shape you want or sculpt a unique shape out of polymer clay.

2. Pour melted ComposiMold over this shape.

3. Remove the original object and you've got your unique cookie shape mold.

4. Press your raw cookie dough into the mold and carefully remove. You can do this by flipping the mold over and bending the mold away from the cookie dough. 

5. Transfer raw cookie dough shapes to a cookie sheet and bake per recipe instructions.

 

 No Rise Cookie Recipe: Most shortbread cookie recipes work well. Here is a great recipe from our friend Allie, of Baking a Moment.  These cookies hold there shape well.

In the video below you will see how we sculpted the Maine Startup and Create Week logo in two sizes. The larger size is for the cookie mold and the slightly smaller size for a chocolate topper. This created a great effect and quite the impression. 

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ComposiCast

See more on our ComposiCast Products Page. True black, pure white, or clear resins for mold making and casting. The ComposiCast is developed specifically for use in ImPRESSive Putty and ComposiMold.

• 80D Shore Hardness

• 30-45 Min. Working Time

• Mixes 1:1 by weight or volume (no scale required).

• 3 different versions: White, black, and clear. White and clear can be colored with our colorants.

• Paint-able, sand-able, machinable.

• Make sizes up to 4 cubic inches. For larger sizes, chill your mold, pour the resin in intervals, or add fillers. 

•Specifically formulated for ComposiMold and ImPRESSive Putty molds, but it also works great in silicone, latex urethane, and other casting materials.

 1. Make a mold of an object YOU choose. Try ComposiMold or ImPRESSive Putty, Reusable Mold Making Materials.

2. Remove the object from the mold. If you are using ComposiMold or ImPRESSive Putty you can easily make a slice in the mold if necessary to remove the object.

3. Spray or wipe the inside of your mold with a mold release, suitable for epoxy resins, such as ComposiMold’s Mold Release.

4. Slowly mix the ComposiCast Part A with Part B in equal proportions by volume or weight. Be sure to scrape the sides of the mixing container to thoroughly combine all material. (You may add our Resin Colorants or textural materials at this time.)

5. Slowly pour the ComposiCast resin mixture into your mold.

6. Let the ComposiCast cure in your mold for approx. 10 hours or overnight. Remove to admire your solid plastic casting! Then repeat steps 3-6 for more castings!

   

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ComposiStone Hard Plaster

Harder Than Plaster...Smoother Than Cement. Go to our ComposiStone order page for more information. This system uses a dry mix and water at a ratio of 2.5 parts powder to 1 part water; and not less than 2 parts powder to 1 part water by weight or volume. It solidifies to a beautiful light Gray color. The texture is similar to a cement feel, but much smoother in appearance.

 

Ideal For:

Outdoor/Lawn Ornaments

Shelf Ornaments

Sculptures

Craft Parts

Other General Applications

 Shelf Life and Storage: Composi-Stone should be stored at room temperature in a dry location. Containers must be tightly closed as a protection from moisture and foreign material.

   

Crayon: 

Crayon is a low melt paraffin wax with color pigments added.  And it works great in ComposiMold  (Original or Flex) and ImPRESSive Putty. 

 
What to do you do with crayons that are broken and worn? You could make round shapes using a muffin tin as seen in the background. Or you could make very cool crayon castings with ComposiMold. 

To make: remove the wrapping from the crayons, melt the crayons. We melted in the oven at low temperatures, but you can also do it on the stove. Be careful not to burn the wax. 

To prepare the ComposiMold mold: pick a shape, place it in a safe mold box or container. We used a tupperware plastic container (same as what comes with the ComposiMold Starter Kit). Spray with mold release and bubble buster. Pour on the melted ComposiMold and cool in the freezer. 

Let the ComposiMold get nice and cold so it can handle the hot wax. 

Pour the crayon wax into the cold ComposiMold mold. The pig in front used two different color pours. 

Let cool and color! 

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Encaustics

Encaustics is a mixture of damar resin and beeswax. It works great in the ImPRESSive Putty. For sizes up to approximately 6 cubic inches, you do not need chill your mold. Above 6 inches, chill the ImPRESSive Putty by placing it in the freezer for an hour.

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Epoxy Putty, Apoxie Putty, Milliput, or other Sculpting Putty

There are many different epoxy putties and we haven't found any that don't work great with the ComposiMold or ImPRESSive Putty. The putty is pressed into the molds and allowed to cure.  For most epoxy putties, the ComposiMold-Original works well, but if you have a very firm putty, use the COmposiMold-Firm. ImPRESSive Putty works extremely well with the putties.

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Fondant:

Fondant, Marzipan, Modelling Chocolate, Gum paste, they all work great in ComposiMold. We recommend the ComposiMold-FC. Press softened fondant into your mold with your hands or a rolling pin and remove immediately. No mold release is necessary for fondant.  When casting edible treats, you can also use: no-rise cookie dough recipes, gummies, gum paste, ice, butter, and more!

ou can easily create a cast in your mold with fondant or gum paste! This can be done by using the "push mold" technique. This works with fondant, gum paste, modeling chocolate, marzipan, and other edible sugar treats.

Once your ComposiMold has cooled back to original rubbery consistency, remove your original part and simply press the fondant or gum paste into the mold. You can also use a "2 part mold" technique and press a ball of fondant in between the two portions of your mold. Coloring can be added to the fondant before or after you make your cast.

 Tips:

  •  Be careful not to warp the fondant casting when removing it from your mold. You can "bend" the mold away from the cast and let the cast "fall" out of the mold.
  • Cooling the fondant or gum paste will make it firmer so it will not deform as easily when you remove it from the mold.
  • Do not leave the  fondant in the ComposiMold overnight as it will become sticky.

  

     
See more videos on YouTube
 

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Hot Glue and Embossing Powder:

Hot glue and Embossing Powder work really well in our ImPRESSive Putty. After you have made your mold, just pour or squeeze in the hot glue. Do not pour the hot glue if it is above 220 F. 

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Jello or Gummy Casting

The key to great Jello Legos is to use ½ the water that the recipe says or the Jello will be too soft and will likely break. 

 Jello…any flavor…Vegetable oil as a mold release, and ComposiMold to make the mold
Use a microwave to melt the ComposiMold
And a refrigerator to chill the mold and Jello

Use a toothpick to pull away any bubbles from the surface of the Legos. You don’t have pop the bubbles, just pull them away from the surface of the Legos.
Chill the mold in the refrigerator or freezer to make the mold faster. 

Before pouring the Jello, make sure it has cooled to room temperature…place it in the refrigerator to cool it faster.

Spray the mold with vegetable oil for a mold release. Wipe away any access. Too much mold release will leave streaks on the castings.
Pour the Jello into the mold cavities.

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Low Melt Metals

ImPRESSive Putty works well with low melt metal such as Wood's Metal. It can handle temperatures up to approximately 200 F when the mold is chilled. ComposiMold does not work with metals.

ImPRESSive Putty also works for casting the wax for the lost wax process. Make a mold like you would for any wax and use it in the lost wax process to make a metal casting. 

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Moldable Plastic

Shapelock or InstaMorph or Friendly Plastic or Polymorph plastic that becomes putty-like when melted in hot water and becomes rigid at Room Temperature. It is made from polycaprolactone plastic. It turns clear when it is in rubbery form and cools to a white slippery, hard, plastic. As a mold material, it is typically a bit hard, but as a casting material it works great in the ImPRESSive Putty. Just press it in to your ImPRESSive Putty mold after you heat it.

The process:

Make your mold from ComposiMold-Firm or ImPRESSive Putty by melting in the microwave and pouring over your part you are duplicating. Start with a simple 1-part mold, but you could make more complicated molds by pressing two halves together.

 The mold must be hard to be able to push the Shapelock into the mold. To make the mold stiffer and to allow the ComposiMold-Firm to handle the temperatures of the hot Shapelock, place the PowerMold in the freezer for a while. You do not need to chill the ImPRESSive Putty.

Push the melted moldable plastic into your mold cavity and fill the voids.

That’s it. You don’t need a mold release to make the castings.  Since both ImPRESSive Putty (and ComposiMold) and Shapelock are reusable, you can melt and remelt the mold and the Shapelock to make a variety of shapes.

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Paper Mache

 When making paper mache casting in ComposiMold or ImPRESSive Putty, do it in layers and let the outer layers dry prior to putting on more layers. After you have several dry layers of the paper mache, you can add more layers and the first layers will protect the mold. 

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Plaster of Paris, Ultracal, Hydrocal, Dental Plaster:

Mix plaster and water together in a 72 parts plaster to 28 parts water, by weight, or to a toothpaste-like consistency. Traditional plasters cure well but leave a slight soft layer on the outside of the casting. To avoid this, apply a layer of ComposiMold's Plaster Release to the mold before pouring casts. Fast curing masonry cements work great and cure extremely strong. Follow instructions for mixing ratios. We also have the ComposiStone specifically for this use: strong, smooth castings.

We also have ComposiStone Hard Plaster which works well for hard, strong plaster castings. ComposiStone is harder than plaster, but smoother than cement. It can be painted with most paints.

 

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Polyester resin

Polyester resin is the cheapest of the plastic resins. It is also smelly and harmful to breath in the fumes. It does work with ComposiMold and ImPRESSive Putty. Be sure to be in a well ventillated space, wear gloves, and a heppa filter. Because of the exotherm of the polyester during curing, you can do sizes up to approximately 3 cubic inches if the resin in in a large mass. With ImPRESSive Putty, you can do up to about 6 cubic inches. For larger pieces, chill your mold, add fillers to reduce the amount of resin used, or pour in intervals so each layer cures before doing the next layer. Do not try to change the formulation  between the hardener and the resin as this can cause incomplete curing.

ComposiMold can also be used for vacuum bagging of polyester composite parts.

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Polymer clay

Polymer clay such as FIMO or Sculpey, Polymer Metal Clay (PMC), Plasticine clays, and others work well in ComposiMold and ImPRESSive Putty to make the original to be molded and also to make the  castings. For firm clays, we recommend the ImPRESSive Putty or the ComposiMold-Firm. To use, just press the polymer clay into your molds.  Do not bake the polymer clay in the molds. This is a great way of using natural objects or making a large number of castings quickly.

Mold clay and polymer clay by using ComposiMold. Air dry clay and other modeling clays make excellent and simple casting materials to mold clay into the shapes you want. You can learn how to make clay molds with ComposiMold quickly and easily. Use an existing found object to create a clay mold or even sculpt your own master object and then make a mold out of it. You'll be creating duplicates of your sculpture in no time!

Push molds are a simple and effective way of making 3-D objects super fast and easy. For example, buttons can be pushed into a mold in seconds flat using most types of polymer clays or doughy casting materials. It's a great way to make polymer clay charms for jewelry.

To Mold Clay in a ComposiMold Mold: 
Follow the basic instructions on our How To Use ComposiMold Page to make a mold with ComposiMold. The tips below will set you up for success when creating a great push mold for polymer clay, FIMO, Sculpey, play dough, PaperClay, and even fondant or gum paste. 

The Key to 
How to Make Clay Push Molds in a ComposiMold Mold: 
Think of a push mold as a negative space for you to press your casting material into to pick up the details of the original shape. 

1. Soften your modeling clay or air dry clay per product instructions. Often this means working it in your hands until it has warmed slightly and becomes doughy in texture.

2. Apply Mold Release if you find that it helped your modeling clay release from the mold. 

3. Press your clay casting material into your mold. Be sure to press the clay into the lowest points of the negative space first. This will ensure that the clay casting material picks up all the details of the mold. 

4. Carefully remove your clay casting from the mold. This can be done by turning your mold upside down and letting it fall out. (You may have to slightly bend your mold away from the clay to release it.) 

5. If your modeling clay distorts when you pull it out of the mold, refrigerate the mold and clay. This will make the clay harder and firmer allowing you to pull it out of the mold more effectively with less distortion. 

 

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 Polyurethane or Urethane: 

ImPRESSive Putty works with most urethane resins. ComposiMold also works, but is more succeptable to heat concerns on larger molds. Choose a urethane with a longer cure time. These create less heat as they cure. You can also experiment with freezing the mold prior to pouring higher temperature urethane resins. Be sure to use talc powder/baby powder as your mold release before each casting made.

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Silicone: 

Silicones castings work great in ComposiMold molds. Make castings with both platinum or tin cured silicone rubbers. Oogoo also works (Oogoo shrinks by up to 50%).

 

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Soaps: 

Shea Butter and Glycerine Soap make great soaps! Chill the mold prior to pouring any higher temperature soaps (above 140ºF) in the ComposiMold. We recommend ComposiMold-Flex because you can flex the soap out of the mold easier without causing damage. ImPRESSive Putty can handle higher temperature soaps.

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Waxes:

Waxes can be for candle molds, lost wax process, encaustics, or other application. Soy wax, Paraffin wax, Beeswax, and Melted Crayons work really well. Chill the mold first for higher temperature waxes (above 140ºF).  Try our all natural Soy Candle Wax for candle making and beautiful wax castings. Cools to a white, creamy finish!

ImPRESSive Putty works for microcrystalline waxes used for the lost wax process. Larger pieces may need to be chilled first. ComposiMold cannot quite handle the higher temperature of the microcrystalline wax.

 

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...AND MANY MORE:

For your art, craft, hobby, and hardware projects, you can also try: adding fillers and dyes to casting materials, ComposiMold itself as a rubber casting material, Modeling Compounds, Polyester Resin, Paper Mache and many more!

Do you have a question about using a specific casting material that was not answered here? Email or call anytime!