How To: Make a Silicone Mould

How To: Create a Silicone Mould – Silicone moulds have revolutionised the world of epoxy resin art, offering new and endless possibilities for creating unique, intricate resin designs. Whilst there are so many silicone moulds to choose from, sometimes you just can’t find the right one for your project. In this blog article, we will walk you through the process of making your very own silicone moulds.

Let’s delve into the step-by-step process of creating silicone moulds for your Epoxy Resin or Jesmonite art:

Step 1: Choose Your Pattern: Select an object or template that you want to replicate using epoxy resin or jesmonite. It can be a small figurine, a coaster, a dish, a piece of jewellery, or any other item that inspires you. Ensure the pattern is clean and free from any dirt or dust. You may also need to apply a release agent, ideally the Ease Release 200 Spray, to ensure easy removal of the mould later on.

It is important to note that the silicone is going to mimic the exact finish of the pattern you have chosen to reproduce. If that surface has any bumps or does not have a shiny finish, then the silicone is going to replicate those features, so when you pour your resin, you will end up with a matte or dull finish.

Step 2: Prepping your working area: After you have gotten your pattern sorted and are happy with the finish, plan your mould. Ensure you have a flat and dust free working bench.

Create a mould wall. Something that fits comfortably around your pattern and creates a high wall, that is above your pattern to avoid over-spill. Depending on the size of your pattern, it is common to use lego pieces (yes, lego!), old ice-cream containers or other polypropylene materials that can be easily peeled away from the resin. Make sure you place your pattern in a suitable position for you to be able to easily de-mould it, once the silicone has cured.

Step 3: Mixing the Silicone: Follow the instructions provided by the manufacturer of the Silicone Rubber you are using, for accurate mixing ratios. Carefully measure the required amounts of Part A and Part B of the silicone. Ensure you check whether the silicone is measured by weight or volume before use.

Thoroughly mix the components together (much like mixing epoxy resin) until you achieve a uniform consistency. Take care and mix slow to minimise the introduction of air bubbles during the mixing process.

If you are mixing large volumes of silicone, it is recommended to mix with a drill and use a vacuum to release the air bubbles created during the mix. This isn’t necessarily possible with some silicone systems, due to their very fast setting times.

Step 4: Pouring the Silicone: Pour the mixed silicone into the mould box you created, making sure to cover the pattern completely. If you’re working with a more complex model, you may need to pour the silicone in layers, allowing each layer to partially cure before adding the next layer.

For best results, pour your silicone in one corner of the mould and allow the silicone to flow, filling the entire mould. Ensure you have poured at least 1.5cm over the patterns highest point.

Step 5: Curing and De-moulding: Follow the recommended curing time provided with the silicone kit. Keep in mind that curing times may vary based on the specific silicone used, volumes and room temperatures. Once the silicone has fully cured, carefully remove the silicone from the container or mould box. Gently flex the sides of the mould to release any air pockets and continue with de-moulding.

Once the silicone mould has been released from the mould walls, then gently remove your pattern. Move around the mould to create an air release for easy removal of the pattern. It is important to be gentle to avoid damage to the silicone or the pattern. Allow the freshly poured mould to ‘cure’ for at least 24 hours before using with resin.

Step 6: Cleaning and Preparing the Mould: If necessary, clean the mould with warm soapy water to remove any residual release agent or debris. Let it dry completely before using it for resin casting. Trim any excess silicone or film from the edges for a cleaner finish. Now you’re ready to go!

Once you have created your mould, you will want to fill the mould with water, then tipping that water into a measuring cup to see how many mls it will hold. This will then be the total amount of resin you will need to mix up when pouring. Again, just make sure your mould is completely dry before using it for resin pours.

Tips for Successful Silicone Mould Making:

  • Maintain a clean and dust-free working environment to ensure the best results.
  • Use a mould release agent before pouring resin into the silicone mould to facilitate easy removal of the cured resin piece.
  • High-Quality Silicone: Art Tree Creations silicone kits are made from premium-quality silicone, ensuring excellent flexibility and durability for long-lasting use.

The benefits of creating a silicone mould is its versatility: silicone is suitable for various applications, including epoxy resin art, jewellery making and crafting. Silicone is also suitable for different casting materials such as epoxy resin, jesmonite, acrylic resin, concrete, polyurethane resin, or plaster.

We recommend watching this informative reel on how to create a silicone mould: This visual demonstration will provide valuable insights and hopefully inspire your creative process.

Creating silicone moulds for epoxy resin art allows you to unleash your artist within and bring your imagination to life. Silicone makes your next resin project become even more accessible and enjoyable.

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We are a 3rd generation of family-owned business specialising in epoxy resin manufacturing and supplies. We are located in Perth, Western Australia, where we manufacture and distribute all of our resin products. We focus on three characteristics: Dependability, Customer Service and Uniqueness.
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