Unleash your creativity with 3D printing!

3D Printing Spot Logo

What Is The Difference Between UV Resin And Epoxy Resin

What Is The Difference Between UV Resin And Epoxy Resin | 3D Printing Spot

Updated by

William Stone


November 2, 2023

Key Takeaways

  • UV resin cures quickly under UV light, while epoxy resin has a slower curing process.
  • UV resin is generally suitable for smaller projects and delicate designs.
  • The epoxy resin is better suited for larger applications and projects requiring durability.

In the world of resins, what sets UV resin apart from epoxy resin? Let’s explore the distinctions that differentiate these materials.

UV resin cures under ultraviolet light within minutes. In contrast, epoxy resin takes hours to cure. UV resin is generally thinner and less durable but quicker and easier to use than epoxy resin, which is thicker, more robust, and offers a higher level of versatility for different projects.

I’ve personally navigated the nuances that separate UV from epoxy resin. The choice isn’t just about curing time or viscosity. It’s about picking the right partner for your creative dance. UV resins are perfect for small, lively projects. Epoxy, conversely, is your slow, intimate waltz, providing a sturdy, lasting bond.

This article may contain affiliate links where we earn a commission from qualifying purchases.

Table of Contents

What Is The Difference Between Epoxy Resin and UV Resin

While both of these materials are commonly used for similar purposes, such as creating stunning jewelry and other artistic crafts, they have distinct differences that make each one better suited for specific applications.

UV resin is a type of material that hardens and cures upon exposure to ultraviolet (UV) light, which can be sourced from sunlight or specifically designed UV lamps. UV resin is known for its fast curing time—a matter of minutes, in some cases—making it ideal for smaller projects and those requiring quick results.

Conversely, epoxy resins are a two-part system that hardens and cures when mixed with a hardener. Unlike a UV resin that can cure under UV light, epoxy resin requires a chemical reaction between the two components to solidify.

The table below highlights the differences between epoxy resin and UV resin:

Feature UV Resin Epoxy Resin
Curing Time Minutes under UV light Hours
Durability Generally less durable Highly durable
Thickness Thinner consistency Thicker consistency
Ease of Use Easier to use Requires careful mixing
Versatility Suitable for small projects Suitable for various projects

The Curing Process

When working with resins, the curing process is a critical step, but it differs depending on the resin type.

Curing with UV Light

UV resin cures under exposure to UV light or sunlight. The UV light initiates a chemical reaction in which the resin hardens rapidly. But it's essential to use thin layers when curing with UV light because the light can't penetrate deeper than 1-2 mm of resin thickness.

A UV lamp or a UV LED can be used to cure the UV resin, as both sources provide the UV rays that activate the curing process. Curing time with a UV lamp is relatively short, ranging from minutes to hours, depending on the lamp's strength and resin thickness.

One can also use sunlight as a natural source of UV light, but the curing time may vary due to the sun's intensity and the weather. Check out the explanations in this video.

Curing with Hardener and Heat

The mixing initiates a chemical reaction that causes the epoxy to harden and cure. The recommended ratio of resin to hardener can vary depending on the product, but it's crucial to follow the instructions on the packaging to achieve the desired results.

The curing process for epoxy resin depends on several factors like temperature, resin thickness, and the hardener used. Generally, it takes longer for epoxy resin to cure, ranging from 24 hours to even weeks, depending on these factors.

This slower curing process allows for working on larger projects and even enables building up thicker layers of up to 5cm if desired. Heat can speed up the curing process of epoxy resins.

While some epoxy resins can cure at room temperature, applying a consistent heat source helps to facilitate a faster and more uniform cure. Using a heat gun or placing the project in a temperature-controlled environment can optimize the curing process and create a more durable finish.

Physical Attributes and Quality Comparison

In this section, we will compare the physical attributes and quality of both epoxy resin and UV resin, focusing on two aspects.

Transparency and Appearance

UV resin is known for its excellent transparency, providing a crystal-clear finish that is glossy and glass-like. It cures quickly under UV light, which helps prevent the formation of air bubbles, resulting in a more transparent surface.

Epoxy resin, conversely, requires mixing with a hardener before it cures. This process increases the chances of introducing air bubbles, leading to a slightly less transparent finish.

However, epoxy resin still offers a high level of transparency and is also known for its versatility in the final finish, including matte or glossy options, as shown in this video.

Strength and Durability

When considering strength and durability, epoxy resin outperforms UV resin in most cases. Epoxy resin cures through a chemical reaction that results in a solid, durable, and highly resistant material.

It can be applied in thin layers or used to create a thick, protective coating. This versatility makes epoxy resin ideal for larger projects and applications that require toughness and longevity, such as furniture and automotive parts.

UV resin, while not as strong as epoxy resin, still offers some durability and hardness. It cures quickly under UV light, which can be an advantage for small projects and intricate designs, such as jewelry making.

However, the fast-curing nature of UV resin limits the maximum layer thickness compared to epoxy resin. While it is suitable for some applications, it lacks the same level of strength, making it less ideal for heavy-duty projects where extra durability is key.

Preparation and Application

Let’s go deeper into the preparation appliances that can be used.

Mixing and Application Process

When it comes to preparing and applying UV resin and an epoxy resin, there are distinct differences. With UV resin, you don't need to measure or mix any additives since it's a one-component material.

It's instantly ready to use. However, epoxy resin requires accurate measurements and a mixing process, as it consists of two liquids, resin, and hardener, that need to be combined in specific proportions, often 1:1.

Before applying these resins to your project, make sure your molds or surfaces are clean and free of dust or debris. To prevent the formation of air bubbles, pour the resin into the mold or surface slowly and steadily.

When using UV resin, it's crucial to apply it in thin layers, as thicker layers may not cure properly under UV light. Conversely, epoxy resin can be applied in varying thicknesses, but the curing time may differ depending on the amount used.

Safety Precautions

While working with UV resin and an epoxy resin, it's critical to take certain safety precautions. When handling these materials, always wear protective gear such as gloves, face masks, and safety glasses.

Because UV resin requires UV light to cure, it's essential to protect your skin and eyes from prolonged exposure to UV light, which can cause irritation or damage. For this reason, wear a UV face mask or protective eyewear when working with a UV lamp or other UV devices.

Additionally, it's advisable to keep uncured UV or epoxy resin away from children and pets, as contact with skin or ingestion can cause irritation or other health issues. Always make sure to store your resins and other supplies in a safe, secure location.

Project Suitability for a Resin Selection

When deciding whether to use UV resin or epoxy resin for your projects, it's essential to consider the specific requirements and desired outcomes.

Jewelry and Small Crafts

UV resin is perfect for jewelry making and small craft projects due to its rapid curing time and ability to cure in thin layers. When exposed to UV light, UV resin cures in a matter of minutes, allowing for faster project completion.

Epoxy resin, conversely, involves a mixing process and takes a longer time to cure, which can be impractical for small projects. Air bubbles can also be an issue with epoxy resin, making it less ideal for creating clear, bubble-free pieces for jewelry and small crafting projects.

Large and Flat Projects

For larger projects, such as countertops, furniture, and large surfaces, epoxy resin is typically the better choice. Because it can be poured and spread in greater volume, epoxy resin is more suitable for these types of projects.

Epoxy resin's longer curing time allows you more time to manipulate the material and ensure a smooth, even surface. The stability and durability of epoxy resin also make it a popular choice for furniture and large coating applications.

Decorative and Embellishments

Both epoxy resin and UV resin can be used for adding decorative elements and embellishments to your projects. You can add pigments, glitter, and other additives to both types of resins to create unique and vibrant designs.

UV resin, with its fast curing process, is excellent for delicate and detailed embellishments where you may need to work quickly. It is also suitable for embedding small objects as the UV light quickly cures the resin around the object, holding it in place.

Epoxy resin requires more time to cure, so it may not be the best choice for time-sensitive decorations. However, due to its long-lasting and durable properties, epoxy resin is perfect for tabletops and other surfaces where embellishments are subjected to everyday wear and tear.

Home /

What Is The Difference Between UV Resin And Epoxy Resin


William Stone

William Stone

William has spent 20 plus years in the custom manufacturing industry as a COO, CEO and Owner of various custom product businesses. His experience has exposed him to all types of manufacturing from die cast, die struck, injection molding, CNC machining, laser etching, engraving and of course 3D printing.

Learn more about William Stone

Most Recent

Similar Posts You Might Like