How to Make Resin Moulds with Polymer Clay & Resin Crafts?

How to Make Resin Moulds with Polymer Clay & Resin Crafts?

Dec 15, 2023

Making unique and custom designs with polymer clay and resin crafts has become increasingly popular. Creating resin moulds is one way to add a personal touch to your creations. This blog will guide you on making resin moulds for your polymer clay and resin crafts. We will cover everything from choosing the right mould-making material to demolding your resin mould. To learn this process under expert guidance, join a resin art course today!

Materials Needed to Make Resin Moulds with Polymer Clay & Resin Crafts

To get started on your resin mould-making journey, gather the following materials:

  1. Polymer Clay: To ensure top-notch results, start with a high-quality brand like Sculpey or Fimo. These clays possess exceptional flexibility and are user-friendly, making them ideal for crafting intricate designs. Remember, the type of polymer clay you opt for will greatly impact the overall quality and level of detail of your final resin mould. 
  2. Resin: When selecting a resin for creating moulds, opting for a clear casting resin of superior quality is important. One popular option is epoxy resin, favoured for its rapid curing time and ability to yield exceptionally clear outcomes. The choice of resin directly impacts the mould's robustness, transparency, and longevity. 
  3. Silicone Mould Putty: This mould-making material offers several advantages worth considering. First and foremost, it provides easy and precise moulding, ensuring you achieve the desired shape accurately. Additionally, it's important to choose a silicone putty that is non-toxic, odourless and provides a sufficient working time. 
  4. Measuring Tools: When it comes to mould-making, precise measurements are essential for achieving impeccable results. A dedicated set of measuring tools is highly recommended to ensure accuracy and success in your resin projects. 
  5. Release Agent: You can effortlessly prevent sticking issues by employing a suitable release agent like mould release spray or gentle baby powder. Furthermore, this simple but effective technique even benefits the longevity of your cherished moulds, making it a valuable addition to your creative endeavours.
  6. Mixing Tools: You will need mixing sticks and disposable cups to measure and blend your resin effectively. Opting for wooden or plastic sticks is highly recommended. These materials are less likely to interact with the resin, ensuring a proper mixing process without compromising the quality of your final product.
  7. Optional Additions: Depending on your project, you may also need additional materials such as dyes, pigments, glitters, or inks to add colours and effects to your resin creations. Whether you're aiming for bold and vivid tones or subtle and delicate nuances, these additional materials will provide the means to achieve your desired aesthetic.

Step-By-Step Guide on Making Resin Moulds with Polymer Clay & Resin Crafts

Step 1: Prepare the Work Area

Begin by setting up your workspace. Creating a clean and organised work area is crucial to ensure a smooth and hassle-free process. To do this, first, cover your surface with wax paper or a silicone mat. This will safeguard against any potential spills or unsightly stains. Additionally, carefully gather your necessary materials beforehand, ensuring they are easily accessible. Having everything within reach will allow you to work efficiently and maintain focus throughout the task.

Step 2: Create the Polymer Clay Base

Start by taking a small portion of polymer clay and gently kneading it until it reaches a soft and flexible consistency. Transform the clay into a round shape by rolling it between your palms. Afterwards, flatten the ball-shaped clay into a disc form. This disc will act as the foundation for your mould, providing the necessary support and structure.

Step 3: Place the Polymer Clay in the Mould

To initiate, apply a thin layer of mould release spray onto your silicone mould or lightly dust it with baby powder. This step is crucial as it prevents the clay from adhering to the mould. Once the mould is prepared, firmly press the polymer clay base into it, ensuring complete coverage of the entire surface. This ensures proper moulding and solidifies the shape you desire.

Step 4: Add Details and Remove Excess Clay

Now that you've moulded your clay, it's time to add those intricate details and remove any excess material for a polished finish. Grab your sculpting tools and add desired textures, patterns, or shapes to the clay. In the process, pay close attention to the edges of your mould. Use your tools to remove excess clay carefully, ensuring a clean and defined shape. This step is crucial for achieving a professional and refined appearance.

Step 5: Bake the Polymer Clay

To bake the polymer clay, carefully adhere to the instructions provided by the manufacturer. Start by preheating your oven to the temperature recommended on the packaging. Once the oven has reached the desired temperature, place the clay into the oven and allow it to bake for the duration specified in the instructions. Ensuring the clay is fully cooked is crucial, so follow the provided time guidelines diligently.

Step 6: Prepare the Resin

Now, you need to get the resin ready for the next stage. For epoxy resin, combine the resin and hardener in the suggested ratio. This can be achieved by mixing them in a cup and carefully stirring until completely blended. However, using UV resin, you can pour it directly into a mixing cup without any additional steps.

Step 7: Pour the Resin into the Mould

Start by ensuring that the resin is properly prepared and ready to use. Once you're confident about the resin's readiness, carefully pour it into the mould, making sure to fill it to the desired level. Take your time during this process to prevent any spills or accidental mess. Additionally, beware of air bubbles forming within the resin. If you spot any bubbles, grab a heat gun or torch and gently eliminate them.

Step 8: Cure the Resin

To cure the resin completely, it is crucial to follow the instructions provided by the manufacturer. Epoxy resin tends to need heat for thorough curing, which can be achieved by cautiously applying heat using a heat gun or torch until the surface becomes smooth and displays a glass-like finish. Conversely, UV resin necessitates exposure to UV light to trigger the curing process.

Step 9: Demold and Finish

Once the resin has completely cured, removing the piece from the silicone mould is time. Gently flex the mould to release the resin mould - it should come off effortlessly. If you notice any stubborn spots, try applying slight pressure or gently tapping the mould until it releases. Grab some sandpaper or a file to refine the edges and carefully smooth out any roughness. This will give your mould a polished finish, ensuring a professional look for future crafting projects.


Making resin moulds for your polymer clay and resin crafts can be fun and rewarding. The benefits of using resin moulds include replicating intricate designs, cost-effectiveness, creative freedom, durability, and customisation options, making it a preferred choice for craft enthusiasts. With patience and proper techniques, you can create beautiful and unique resin moulds that will take your crafting journey to new heights. Following the steps outlined in this blog, you can create custom moulds that allow you to unleash your creativity and add a personal touch to your creations. So, why not try it and see the endless possibilities that resin moulds can bring to your crafting journey? To learn more about this and many more exciting techniques, visit Arts Shala's website and Contact Us for more information. 

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