What Materials Does Epoxy Resin Not Stick to? Let’s Find Out

The epoxy resin adheres to many surfaces, making it one of the most versatile products out there. For instance, it can stick to all woods, glass, aluminum, and other surfaces. These adhesive properties make it a great product for resin arts and crafts.

In some instances, however, you may not want the epoxy to adhere to a certain surface. Thankfully, there are materials that epoxy resin doesn’t adhere to.

In this article, we’ll look at some of those items. We’ll also talk about their benefits and drawbacks in various resin art projects. Let’s get into it!

What Does Epoxy Resin Not Stick to


1. Polyethylene Plastic

Polyethylene plastic is a high-quality, sturdy, and reusable plastic sheet that contains polyethylene. It’s the first material on my list that epoxy doesn’t adhere to.

More importantly, it’s one of the most commonly used products to make large molds. They make it easy to remove your resin items from the molds. Also, it’s the preferred option by many DIYers and professionals.

You can use it when making cutting boards as well as resin tables. The other benefit of this product is that it’s quite affordable. So, if you don’t want to clean it up after finishing your project, you can simply through it away.

However, note that polyethylene plastic is the most expensive material on my list. Not to forget that you’ll need some experience to determine the ideal size and density for your project.

Benefits

  • High-quality, strong and reusable
  • Ideal for making river table molds
  • Suitable for professionals

Drawbacks

  • More pricy than other materials
  • Requires a little experience to choose the perfect size and density

2. Silicone/ Rubber/ Vinyl

Vinyl, silicone, and rubber are other popular materials that epoxy doesn’t bond to. Among these, silicone is the most popular as well as the most effective product. And many desirable features support its use in epoxy casting.

For instance, it’s heat resistant and affordable. Best of all, you can use it to make any form/ shape you want.

This makes it the best option for making resin molds, especially for smaller items. This includes items like coasters, jewelry, and other unique-shaped pieces.

There are some drawbacks to using these materials though! For instance, silicone molds are not suitable for casting large items. This is because they don’t have the ideal glossiness to promote the easy removal of such items.

Other than that, these molds are very efficient for special items and smaller pours.

Benefits

  • A great option for creating uniquely shaped items
  • Affordable and heat-resistant
  • Efficient for smaller items

Drawbacks

  • Not suitable for making large molds

3. Sheathing Tape

Sheathing tape has so many uses. For instance, it’s used for sealing joints and permanent sealing during foam insulation. Also, it’s ideal for repairing rips and other vapor barriers. Not to forget you can use it in construction membranes and films.

Putting that aside, this material is also used in epoxy crafts. Thanks to its ability to resist bonding with resin. For that reason, it’s used to cover work surfaces in epoxy projects for easy clean-up.

It’s simple to remove from the surface after resin cures and leaves a shiny finish.

Many crafters also love sheathing tape for its cost-effectiveness. Besides, it allows them to create various angles and shapes. On top of that, it allows you to work on various surfaces, regardless of their sizes.

On the downside, sheathing tape may leave many seams on your resin pieces. To remove those seams, you’ll need to buff and sand them later. In other words, you’ll need more time to finish your project.

Benefits

  • Very affordable
  • Allows surfaces to retain a shiny appearance
  • Ideal for creating different angles and shapes
  • You can use it multiple times

Drawbacks

  • May leave your pieces with many seams

4. Wax Paper or, Parchment Paper

Parchment/ wax paper is affordable, yet simple to use. This makes it one of the most affordable options for use in DIY projects. For instance, it’s ideal for making simple molds for small tables. You can even use it to cover natural edge or live edge tables.

However, you should note that wax/ parchment paper molds have some limitations. More notably, once you de-mold your resin items, they may appear cloudy. This is because wax from your paper may get into the resin.

Also, the wax paper doesn’t remain intact while epoxy cures. This movement can cause your pieces to have issues as well.

Benefits

  • Easy to use
  • Affordable
  • Ideal for making small table molds

Drawbacks

  • Wax paper doesn’t stay in place during resin curing
  • Resin may appear cloudy/ foggy

5. Hot Glue

Hot glue is mostly used when making river tables. That’s because it prevents the overflow of resin near the surface you’re pouring. That’s not the only way you can this product though!

For instance, you can also use it to make resin molds and seal any cracks on wood surfaces.

Talking of molds, hot glue is very flexible, allowing you to mold any surface perfectly. Better still, it’s a type of thermoplastic. So, like other materials on my list, epoxy will not stick to it.

One issue with this product is that you can’t use it on its own. Instead, you need to combine it with other materials. Also, hot glue is difficult to remove from rough wood surfaces. It may even leave marks on such surfaces.

Benefits

  • Prevents overflow of epoxy when making river tables
  • Seals cracks on wooden surfaces
  • Ideal for making resin molds

Drawbacks

  • Doesn’t produce good results when used on its own
  • Hard to remove from rough wood

Uses of These Materials in Epoxy Crafts

Materials that don’t stick to epoxy can have many uses in resin crafts. For instance, you can use them to cover your work surfaces and tabletops. In most cases, DIYers use plastic sheeting for that purpose.

That’s because it’s tear-resistant and affordable. You can then tape it to the work surface and peel it off when the mixture cures. Alternatively, you can cover the surface with a plastic storage bag or garbage bag.

Some of these items are also used to make resin molds, both for large and small items. Even better, it allows you to mold various shapes.

Conclusion

All materials I’ve included on my list have one thing in common; not adhering to epoxy. However, you need to note that they’re different and ideal for different applications. So, before you use a certain option for your project, check if it’s suited for that application first.

Also, note that these are not all the surfaces that epoxy doesn’t adhere to. I may have left out other materials like Mylar, Teflon, and nylon.

FAQs

1. Does epoxy stick to a cured resin coat?

Yes! Epoxy can adhere to a coat of resin that has already been cured. However, make sure you prepare the surface properly before you apply another coat. This will allow the fresh coat and cured surface to form an adhesive bond.

2. Will epoxy adhere to aluminum foil?

Epoxy adheres to aluminum surfaces, including aluminum foil quite well. Also, it adheres to glass and all woods.

3. How do I prevent the epoxy from adhering to my molds?

Mixing resin and hardener generates heat. If this heat is too much, it can cause your molds to melt. This eventually causes the epoxy to stick to the molds. To prevent this, cover the mold’s surface with wax or a spray release agent before pouring the mixture. Wax and mold release spray makes it easy to remove your pieces once epoxy cures.