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CopyFlex is GREEN? Yes, and it's now better than ever!

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There are many advantages when making a mold with liquid silicone. In this mold making tutorial, a decorative refrigerator magnet is used to make a single cavity mold which can be used to reproduce the design in many food and non-food mediums. A poured mold is square shouldered and sits level when in use. Once the basics are understood, you will find that this can be a very quick and efficient method for producing molds in quantity. Take advantage of this free resource and learn the basic principles of using a liquid silicone to create this professional looking and durable single cavity mold.

*Please note that this tutorial was originally made using an earlier version of our CopyFlex® material. The instructions are accurate, but any CopyFlex® you order will be our new, improved clear green formula, not the opaque orange you see in these photos.

Mounting an Object in a Mold Box Using Mold-Dit

Step 1

Apply Mold-Dit™ to the back side of the original and press it down into the center of the mold box.  Mold-Dit™ should squeeze out along the bottom, ensuring that a strong - yet temporary - bond has been established and that no silicone will creep underneath.  With the excess Mold-Dit™ removed, the mold box is ready to receive the CopyFlex™ liquid.

Two Part Food Grade Liquid Silicone for Mold making

Step 2

Mix a small amount of CopyFlex™ liquid silicone rubber.  You need just enough to paint a thin coat over the object, ensuring that air bubbles are not trapped on the surface. 

Mixing Two Part Liquid RTV Silicone Mold Making Material

Step 3

Scale out equal parts of A and B by weight, combine the two parts in a container, and mix thoroughly until the color is uniform.  Make sure unmixed material does not remain on the sides or bottom.

Applying a Skim or Print Coat Over an Object to be Molded

Step 4

Using a clean artist brush, paint a thin coat of CopyFlex™ onto the original. The idea here is not to cover the object, it is simply to brush the moldmaking silicone into the details. We call this a “skim coat”, and it ensures that no air bubbles will be trapped in the nooks and crannies of the surface.

Pouring Two Part, RTV, Mold Making Silicone

Step 5

Once the skim coat is applied, a larger batch of CopyFlex™ silicone rubber is prepared and poured to fill the mold box at least 1/4″ above the highest point on the original.

Pouring Liquid Silicone Mold Making Material Over an Object in a Mold Box

Step 6

CopyFlex™ should be poured in one spot from a height of about 12″ which allows the material to stretch as it falls.  We call this a “stretch pour” and it helps eliminate air that was incorporated into the liquid silicone during mixing. 

Liquid Food Grade Silicone Poured Over an Object Mounted in a Mold Box

Step 7

Allow CopyFlex™ to slowly creep over the original until it is covered completely.

Removing Cured Silicone Mold from Object Mounted in a Mold Box

Step 8

CopyFlex™ can be demolded in about five hours.  A quick way to check if your mold is ready to demold is to press a coin’s edge into the surface to see if it leaves an imprint. The CopyFlex™ mold should spring right back without leaving an imprint.