Mold Release Myths Busted: What You Need to Know!

Pros and Cons of Using Mold Release with Silicone Molds

Silicone molds are incredibly versatile tools for resin artists, woodworkers, and floral preservation artists. However, to maximize their longevity and functionality, many consider using mold release agents. In this post, we’ll explore the pros and cons of using non-silicone-based mold releases, such as Mann Ease Release 200 (available on Amazon or through Smooth-On/Reynolds Advanced Materials), and how these can affect your work.

You can buy Ease Release 200 here, but make sure to read this full article first. (BUY NOW)

The Benefits of Using Mold Release

1. Extended Mold Lifespan - Using a mold release before each pour significantly reduces wear and tear on the mold. This is especially beneficial for molds that see heavy use, as it prevents resin from bonding directly to the silicone, which can degrade the mold over time.
2. Improved Mold Durability - Non-silicone-based mold releases create a protective barrier, preserving the mold’s surface integrity and delaying the onset of wear.
3. Easier Demolding - Mold release can make demolding smoother and quicker, reducing the risk of damaging intricate molds or thin edges.

The Drawbacks of Using Mold Release

1. Surface Finish Alterations - The most significant drawback of using mold release is its impact on the casting’s surface finish. While your molds from our shop are designed with a glossy, flawless surface finish to produce projects with extreme clarity and shine, using a mold release can result in a satin finish. This change often requires extra sanding, polishing, or buffing to restore the glossy look.
2. Not Ideal for Floral Preservation - For floral preservation artists, clarity is paramount. A satin finish can obscure the fine details and natural beauty of the preserved flowers, making mold release less suitable for this application.

Recommendations Based on Application

• For Floral Preservation Artists - Avoid using mold release unless absolutely necessary. Our molds are crafted to produce a crystal-clear finish, ensuring your preserved flowers look as vibrant and pristine as possible right out of the mold. The slight protection offered by mold release is outweighed by the potential loss of clarity.

• For Woodworkers - We recommend applying Ease Release 200 before every pour. Resin and wood projects typically require sanding, planning, and finishing regardless of the mold’s surface. The added protection extends the life of your mold and ensures consistent results across multiple castings.

• For General Use - Consider using mold release once you notice the mold’s surface finish starting to degrade or turn matte. This can help preserve the mold for a few additional uses while maintaining acceptable surface quality. However, if you prioritize glossy surfaces and minimal post-work, replacing the mold might be a better option when this degradation begins.

A Balanced Approach

It’s important to remember that silicone molds have a finite lifespan. Even with careful use and mold release application, they will degrade over time. If your work demands a flawless, glossy surface finish straight out of the mold, investing in a new mold might save time and effort compared to labor-intensive post-work on less-than-perfect castings. For busy artists and professionals, waiting too long to replace a mold can lead to excessive post-work, which is neither efficient nor cost-effective.

Final Thoughts

Using a mold release with your silicone molds offers clear advantages, particularly in extending the mold’s lifespan and facilitating easier demolding. However, it’s not without its trade-offs. Carefully consider your project’s specific needs and the desired finish when deciding whether or not to use mold release. By understanding the benefits and limitations, you can make an informed choice that best supports your creative process.