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Below we show you the step by step tutorial on how to make your very own Diamond Mold for pouring large Isomalt Diamonds. At the end of the tutorial is a complete list of supplies used throughout this step by step.

  Step 1

  Step 2

Measure and cut a 3 inch section from a 4 3/4 inch diameter shipping tube in order to create a “mold box” Apply Seal-Dit™ to the inside of the mold box and wipe away any excess, leaving the inside coated and shiny.

  Step 3

  Step 4

Roll out Safe-D-Clay™ so that it is larger than the diameter of the mold box and about 1/4 to 3/8 inch thick. Place mold box on top of Safe-D-Clay™ and trace around inside of mold box to score the clay and leave a circular impression.

  Step 5

  Step 6

Cut out circle of clay with a sharp knife. Apply a thin coat of Seal-Dit™ to the top of the clay circle. Apply only enough to make the surface shiny.

  Step 7

  Step 8

Place glass diamond, top side down, in the exact center of clay circle. The Seal-Dit™ applied in Step 6 insures good contact. Do not press diamond down into Safe-D-Clay™ circle. Glass diamond should rest on the top surface only. Apply a strip of Safe-D-Clay™ around the entire glass diamond flush with the edge, which represents the widest part of the diamond.

  Step 9

  Step 10

Press Safe-D-Clay™ to achieve full contact with diamond and trim with a modeling tool to ensure a level, tight connection between clay and diamond. With a modeling tool, carve circular indentations in the clay flange surrounding the diamond. Notice three indentations close together to ensure proper orientation of the mold when assembled.

  Step 11

  Step 12

Apply a thin coat of Release-Dit™ to the top of the clay flange, including the indentations surrounding the diamond. Measure the height of the diamond as it rests in the “clay bed.” In this example we have a height of 2 3/8 inches.

  Step 13

  Step 14

Adding 1/2 inch to the height of the diamond set in the clay bed will determine where to mark the inside of the mold box to establish the CopyFlex® fill height. In this example the mold box was marked 2 7/8 inches up from the bottom. Using Safe-D-Clay™, form a cylinder 1/2 inch in diameter by 1 inch long and connect it to the diamond by pressing it down on the point until it is flush with the glass diamond all the way around.

  Step 15

  Step 16

Shape the clay to match the facets of the diamond by cutting down the sides of the clay cylinder in line with the facets of the diamond. Apply a thin coating of Release-Dit™ to the clay cylinder. Wash diamond with a light mixture of dish soap and water to remove fingerprints and any excess Safe-D-Clay™ and Release-Dit™. Dry with a soft lint free towel. Diamond must be very clean and buffed to a high shine.

  Step 17

  Step 18

Place mold box over the diamond & clay bed assembly and press the clay bed with a modeling tool against the inside of the mold box so that the clay is completely sealed against the inside wall. Combine and mix 22 ounces (11 oz. of Part A and 11 oz. of Part B) of CopyFlex® Liquid Silicone and pour into mold box up to the fill line. Allow to cure undisturbed for five to six hours at 70 degrees F.

  Step 19

  Step 20

Once the CopyFlex® has cured, turn the mold box upside down to reveal the clay bed made from Safe-D-Clay™. Remove the Safe-D-Clay™ and wash the exposed portion of the diamond with dish soap and water. Dry and buff glass diamond to a high shine with lint free towel. Using a natural bristle artist’s brush, apply a thin but thorough layer of Release-Dit™ on the entire CopyFlex® Silicone flange area that surrounds the glass diamond.

  Step 21

  Step 22

Combine and mix 10 ounces (5 oz of Part A and 5 oz of Part B) of CopyFlex® Liquid Silicone and pour into mold box until it is completely filled. Allow to cure undisturbed for five to six hours at 70 degrees F. Using a sharp knife, place a small cut along the spiral seam of the paper tube and then tear the paper mold box away from the cured CopyFlex® mold.

  Step 23

  Step 24

Separate the two sides of the CopyFlex® mold and remove the diamond and the clay cylinder used to make the pour hole used to fill the mold cavity. Wash the new mold with hot soapy water, rinse and dry with a lint free cloth. This mold is dishwasher safe. The mold is now ready to use. Notice the unique configuration of alignment keys that ensure perfect assembly and the pour hole that was created by the Safe-D-Clay™ cylinder.

  Step 25

  Step 26

Assemble diamond mold using four #84 rubber bands. Pour ClearCut™ Isomalt into mold at 265 – 275 degrees F. To lessen the pitting effect of silicone on Isomalt, fill mold 1/3 full and roll to coat inside and then pour out any extra. Wait until the Isomalt coating hardens then fill the entire mold with more Isomalt and immediately drain the mold once again. Allow Isomalt coating to harden. Fill mold entirely for a third time and un-mold when completely cooled. If properly made, the diamond mold should produce an exceptionally shiny sugar gemstone that is almost water clear with sharp edged facets. Storing ClearCut™ Isomalt diamonds in sealed containers with silica gel packets will insure a good shine and clarity for months.

  Mold Making Supplies Required

Mold Making Supplies Used in this Diamond Mold Tutorial:
– 2 lbs. CopyFlex® Liquid Silicone (Click here to buy)
– 1 lb. Safe-D-Clay™ (Click here to buy)
– 2 oz. Release-Dit™ (Click here to buy)
– 2 oz. Seal-Dit™ (Click here to buy)
ClearCut™ Isomalt (Click here to buy)
– 1 4 ¾” Diameter Tube-It™ – (Click here to buy)
– 4 Bands-Its™ – (Click here to buy)
– 3″ Diameter Glass Diamond – available at Michaels Arts & Crafts
– Natural bristle artist brushes – available at any craft store
– Modeling Tools – available at cake/craft supply stores


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