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From the largest international candle making conglomerates to home hobbyists that enjoy making candles for family and friends, Smooth-On urethane and silicone mold rubbers are used to make molds for casting wax.

You can reference the below step-by-step how to pictorials to learn how candle molds are made.

Also, there are a couple of variables that will help determine which mold rubber is right for your candle making project. Click here to learn what these variables are in our Frequently Asked Questions section. Can we help you select a mold rubber for your wax casting project? Contact our technical support department and we'll do our best to help you.


Martha Stewart Making Gourd Candles Using OOMOO Silicone

Martha Stewart Creates Faux Bois Candles Using OOMOO Silicone Rubber

Creating Candles With Martha Stewart and Smooth-On Urethane Rubber

Using Silicone Rubber To Make A Simple Candle Mold
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New Mold Star 15 – Easy To Use, High Tear Strength Platinum Silicone Offers Advantages
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Smooth-On Silicones Pass High Temp Challenge For Wax Casting
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A Glowing Success Story; Beeskep II Candle Operation Running With Smooth-On Rubber.
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Image Gallery of Beeskep II Candles Cast From Smooth-On Rubbers
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OOMOO Series Tech Sheet - MSDS
Reoflex 30 Tech Sheet - MSDS
PMC-744 Tech Sheet - MSDS

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The Beginners Platinum Silicone - Mold Star 15 is a Shore 15A platinum silicone that is mixed 1A:1B by volume; no weighing scale necessary. The original model is a stone sculpture that should be prepared prior to applying mold rubber.

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Hot glue is used to secure the model to the base of the mold box.

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The model is pressed firmly to the base of the mold box and the hot glue is allowed to dry fully.

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The original model is made of stone and is porous. It should first be sealed prior to applying mold rubber. SuperSeal® is a low-viscosity sealing agent that can be brushed onto the surface without affecting detail.

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SuperSeal® is applied to the original stone model.

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Depending on the porosity of the original model, multiple coats of SuperSeal® may be necessary.

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Once SuperSeal® has been applied to the entire model, it is allowed to dry for 5 minutes.

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Optional: Ease Release® 200 is applied over the original model to aid in demolding.

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The four walls of the mold box are assembled around the model. They are held in place by a mold strap until hot glue can be applied to all seams.

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Hot glue is applied to all seams of the mold box. It is important that the box is completely airtight to prevent any leaks.

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With the model prepped and the mold box fully assembled, Mold Star® 15 can now be poured over the model.

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A partial gallon kit of Mold Star® 15 will be used for the mold.

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Part A is dispensed into a measuring bucket.

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An equal amount of Part B is dispensed into a separate measuring bucket.

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With equal amounts of Parts A and B dispensed, the Mold Star® 15 can now be combined.

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Part A is dispensed into a mixing bucket.

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Part B is added to the mixing bucket with the Part A.

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The two components are mixed by hand. Care is also taken to scrape the sides and bottom of the mixing container

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As the two components are mixed, the colors of Part A (white) and Part B (green) will combine to a solid light green.

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To ensure a thorough mixture, the contents are transferred into a second, clean mixing bucket.

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The two components are mixed until the color is uniform with no white or green streaks present.

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Because Mold Star® 15 is low viscosity compared to other platinum silicones, vacuum degassing is not necessary. The mixture is poured slowly in the corner of the mold box.

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The Mold Star® is poured slowly in the corner of the mold box. The material is allowed to seek its own level over the model. This helps eliminate the potential for entrapped air.

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Mold Star® 15 has a long (50 minute) working time. Not only does this help eliminate bubble entrapment, it also allows the material to be poured slowly or over a large area. Once poured, allow Mold Star® 15 to cure for 16 hours before demolding.

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Once Mold Star® 15 has cured for 4 hours, the mold box can be carefully disassembled.

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The mold is flipped upside down and the bottom of the mold box is removed.

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Flashing is trimmed from the edges of the mold and the opening of the mold cavity.

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To remove the original model, a seam is cut down the back of the mold. Mold Star® 15 has great tear strength, allowing the mold to be stretched a great deal without tearing.

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The seam is cut down the back of the mold until the original piece can be easily removed.

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The original model is removed from the mold. The Mold Star® rubber captured perfect detail from the original model.

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The mold is ready for casting.

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Smooth-Cast® ONYX will be poured into the mold.

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For a metallic effect, Cast Magic® Bronzonker powder will be applied to the mold surface first.

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A light layer of Bronzonker is brushed onto the surface of the mold.

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Once the Bronzonker is applied to the entire surface, any excess is blown off with compressed air.

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A mold strap is used to keep the mold tightly closed while casting resin.

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Part A of Smooth-Cast® ONYX is shaken prior to dispensing.

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Part B of Smooth-Cast® ONYX is shaken prior to dispensing.

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Part A is dispensed into a measuring cup.

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An equal amount of Part B is dispensed into a separate measuring cup.

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Smooth-Cast® ONYX is mixed 1A:1B by volume.

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Part A is added to a mixing bucket.

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Part B is added to the same mixing bucket.

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Parts A and B are mixed thoroughly. Care is taken to scrape the sides and bottom of the mixing bucket.

45

The Smooth-Cast® ONYX is poured into the mold.

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Smooth-Cast® ONYX is allowed to cure for 15 minutes prior to demolding.

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The casting is demolded. The Cast Magic® Bronzonker transfers to the casting surface, producing an inexpensive metallic effect.

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The original stone model (left) is shown with the Mold Star® 15 mold (center) and the Smooth-Cast® ONYX casting (right). A perfect copy!

1

The model is secured to the baseboard using a hot melt glue gun. A section of clear tubing is placed over the model and secured with hot melt glue.

2

This candle application calls for a mold rubber that can withstand high temp-melt wax--225°F/107°C. Smooth-Sil® 910 was selected because of its ability to withstand high heat, its high tear strength and its ability to stretch around deep undercuts.

3

Smooth-Sil® 910 is mixed thoroughly and poured over the model until the rubber reaches one inch over its highest point.

4

The rubber is allowed to cure and the original is carefullly extracted.

5

The Smooth-Sil® 910 captured perfect detail from the original and the mold is ready for wax casting.

1

The original wood model is mounted to a base. PVC tubing is cut in half and will be used to contain the liquid rubber.

2

Ease Release release agent is applied to the model.

3

Release agent is also applied to the plastic tubing.

4

The plastic tubing halves are clamped together around the model.

5

Parts A and B of PMC®-744 urethane rubber are dispensed into a clean mixing container.

6

Parts A and B of the rubber are thoroughly mixed.

7

The urethane rubber is poured into the tube around the model and allowed to cure overnight.

8

The next day, the PVC halves are removed and the model is removed.

9

Hot liquid beeswax is then poured into the mold cavity and allowed to cool.

10

The finished wax casting is then removed from the mold.

11

With this single rubber mold, Beeskep II will make thousands of candles.

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