What Is the Difference Between Casting and Epoxy Resin Art?

What Is the Difference Between Casting and Epoxy Resin Art?

Dec 13, 2023

Resin art has become increasingly popular among artists due to its ability to create a glossy and flexible finish. If you're an artist working with resin materials, it's important to understand the difference between casting resin and epoxy resin art. Learning from others who have experience in resin art can be a great way to improve your skills and discover new techniques. Consider checking out a reputable platform offering online resin art classes taught by experienced resin artists.

This blog will provide you with all the information you need about these two types of resin, including their properties, uses, and how they differ from each other. Whether you're just starting with resin art or have been doing it for a while, learning about casting resin and epoxy resin can help you improve your artistic skills.

What is Casting Resin, and How is it Used in Art?

When it comes to resin art, casting resin plays a crucial role in bringing artistic visions to life. It is a specialised type of resin designed for creating deep pours and capturing intricate details in moulds. Casting resin is a specialised type of resin designed for creating deep pours and capturing intricate details in moulds. Unlike epoxy resin, casting resin has a specific formulation that allows for thicker pours without overheating or cracking.

Properties of Casting Resin

The key properties that make casting resin ideal for certain art projects include:

  • Low Viscosity: This means that the resin has a thin consistency, which facilitates easy flow into moulds.
  • High Transparency: Casting resin is known for its high clarity, resulting in crystal-clear castings.

These properties make it perfect for moulding objects and creating stunning visual effects within the resin art.

Uses of Casting Resin in Art Projects

Casting resin finds diverse applications in the art world:

  • Creating Sculpture Replicas: You can use casting resin to make detailed replicas of sculptures, preserving the intricacies of the original artwork.
  • Jewellery Making: In delicate jewellery designs where intricate details need to be preserved, casting resin is often used.
  • Embedding Objects: One popular technique with casting resin is embedding objects within the resin art itself, adding depth and dimension to the artwork.

Understanding Epoxy Resin

Epoxy resin is a versatile and popular medium in the world of art, known for its unique properties and wide range of applications. Here's what you need to know about epoxy resin:

Epoxy resin is a type of reactive polymer that forms a strong and durable bond when cured. It is created through the reaction of epoxide or oxirane groups with various hardening agents, commonly referred to as curing agents or hardeners.

Properties of Epoxy Resin

  • Self-Levelling Nature: Epoxy resin can level itself out, creating a smooth and even surface without requiring extensive manipulation.
  • Strong Adhesive Properties: Once cured, epoxy resin forms a powerful bond with different materials, making it ideal for applications that require durability and longevity.

Uses of Epoxy Resin in Art Projects

  • Coating Paintings: You can use epoxy resin as a final coating for paintings to achieve a glossy and protective finish, enhancing the depth and vibrancy of colours.
  • Creating Durable Surfaces: Epoxy resin is commonly used for coating tabletops, countertops, and other functional art pieces due to its resistance to heat, moisture, and scratches.
  • Resin River Designs: Epoxy resin is favoured by artists for creating captivating “resin river” designs in furniture, where pigmented resin is poured into grooves or channels to simulate flowing rivers or streams.

Read Also - Epoxy Resin River Coffee Table Online Workshop

Comparing Casting Resin and Epoxy Resin in Art Projects

When it comes to resin art, artists have to make a crucial decision between casting resin and epoxy resin. Each type has its unique properties and characteristics that can significantly impact the outcome of an art project. Let's explore the key differences between casting resin and epoxy resin in art projects:

Pouring Depth and Viscosity

  • Pouring depth is a critical factor to consider when choosing between casting resin and epoxy resin. Casting resin is specifically formulated for deeper pours, allowing artists to create thick layers or fill moulds with ease. This makes it ideal for projects that require a significant amount of resin, such as creating large sculptures or river tables.
  • On the other hand, epoxy resin tends to have a higher viscosity, making it better suited for thinner applications. While it can be poured in layers, achieving the same depth as casting resin may require multiple pours or additional techniques like building up layers gradually.
  • It's important to note that exceeding the recommended pouring depth for either type of resin can lead to issues such as incomplete curing or excessive heat generation during the curing process.

Read Also - Tap Into Your Creative Side: Discover Resin Art Classes Online!

Curing Time and Hardness

  • Curing time is another crucial aspect to consider when comparing casting resin and epoxy resin. Generally, casting resins have a longer curing time compared to epoxy resins. This means that artists using casting resin need to be patient and allow sufficient time for the resin to fully cure before handling or de-moulding their artwork.
  • In contrast, epoxy resins typically cure faster, allowing artists to move forward with their projects more quickly. However, it's important to carefully follow the manufacturer's instructions regarding curing time to ensure optimal results.
  • The hardness of cured resin also differs between casting and epoxy resins. Casting resins tend to have a higher Shore hardness, making them more rigid and less flexible. Epoxy resins, on the other hand, can have varying levels of flexibility depending on the specific formulation used.

Air Bubbles and Mixing Ratio

  • Air bubbles are a common challenge in resin art, but they can be managed with proper techniques. Both casting resin and epoxy resin can develop air bubbles during the mixing process.
  • To minimise air bubbles, you can use a torch or heat gun to gently apply heat to the surface of the resin. This helps reduce surface tension and allows trapped air bubbles to escape.
  • Additionally, accurate mixing ratios are crucial for both types of resin. Following the recommended mixing ratio ensures proper curing and optimal performance of the resin. Deviating from the specified ratios can result in issues such as incomplete curing or compromised material properties.

Read Also - A Step-By-Step Beginners Guide: How To Do Epoxy Resin Art?


Resin art offers endless possibilities for you to express your creativity and produce stunning, glossy masterpieces. To understand the unique properties and applications of casting resin and epoxy resin, you should explore the various techniques and styles that each resin type offers. With the right knowledge and experimentation, you can unlock the full potential of casting and epoxy resin art.

Discover more about epoxy resin art at Arts Shala and unleash your full artistic potential through online classes and workshops led by experienced resin artists. Contact Us today on Arts Shala to dive deeper into the world of resin art.

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