How to Make Epoxy Resin Coasters Step by Step: (DIY Guide)

Coasters making is one of the most interesting projects you can undertake with epoxy. You can use them to protect your furniture and add a decorative feel to the tables. On top of that, they safeguard various surfaces from any type of damage.

But how do you make an epoxy resin coaster? Well, by the end of this article, you should be able to create your epoxy coasters like a pro. Besides, it’s relatively simple that anyone, including beginners, can handle.

That being said, let’s check out the steps you need to follow!

10 Steps to Create Epoxy Resin Coasters

One way to enhance your DIY creativity is to craft things with epoxy resin. It’s a simple process that doesn’t even require any rock-solid expertise. So, anyone can try out with the right accessories and provided a well-organized tutorial.

And that’s what we’re focusing to bring you today!

So let’s first start by checking the list of things you’ll need to make resin coasters;

  • 400- 800 assorted grit sandpapers
  • Silicone coaster molds
  • Silicone casting release spray
  • Clear Epoxy resin & hardener
  • Plastic measuring cups
  • Rubber gloves
  • Heat gun
  • Mixing sticks
  • Decorative items

Remember, there are different shapes and designs of coaster molds. So, while gathering materials, choose the right type of mold for your project. Once you’ve everything you need, move on to the next step.

1. Prepare the Working Area

First and foremost, make sure the room you intend to work in has adequate ventilation. Also, before you start handling any material, put on the rubber gloves to protect your hands. After that, cover the working surface with a cheap shower curtain or plastic table cloth. Then lay out the materials on the prepared surface.

Also, make sure to wear a face mask to protect yourself from harmful resin fumes. If you’re working for a long time with no precautions, there’s a high chance you might get shallowed.

2. Prepare Your Coaster Molds

Clean the molds to remove any type of dirt and fingerprints. Then spray the mold release into the casting. Using a cloth/ paper towel, spread the agent around the casting to ensure full coverage. The solution prevents the epoxy from sticking to your castings.

3. Measure & Mix Epoxy

Pour equal proportions of hardener and resin in 2 separate measuring cups. Then combine them in a larger mixing cup and stir with a wooden stick. When the mixing is complete, gently tap the mixing cup against the tabletop. This will help to release any bubbles that may be trapped in the mixture.

4. Pour the 1st Layer of Resin

The first coat requires a small amount of the mixture. So, you just need to pour enough mixture to cover the bottom of your molds. Then tip the molds from side to side until their bottoms are covered uniformly. Now, pass a heat gun over the resin surface and leave it to cure.

5. Add Decorative Items

Place your decorative objects over the first layer. The position and location of those items are up to you. After placing the items on the epoxy, press them gently to embed them into the castings. Also, if you’d like to add paint drops to your coasters, this is the right time to do it.

6. Top off Your Castings

After embedding objects, pour the final coat of epoxy to fill the molds. Unfortunately, some embedded items can float or shift as you top off the castings. If that happens, use a stir stick or pin to submerge them into the mixture.

The other thing you may note while pouring epoxy is the formation of large air bubbles. Luckily, you can easily get rid of these bubbles by popping them with a needle or pin.

Lastly, avoid overfilling the castings and ensure the poured epoxy is level. For this reason, we recommend that you go with a self-leveling epoxy.

7. Remove Air Bubbles

We mentioned how you can pop large bubbles earlier, right? But, what about the small air bubbles? Well, that’s why this step is equally important.

We advise that you let your castings for about 5 minutes. Doing so will allow air bubbles to rise to the resin surfaces. Better still, some bubbles with pop on their own. But the keyword here is ‘some’, meaning not all bubbles will pop.

To eliminate the bubbles, you should use either a heat gun or an artist butane torch. Turn it on and move it around the resin until the mixture is bubble-free.

8. Leave the Castings to Cure

Curing time tends to vary from one epoxy to another. Read the manufacturer’s guidelines to determine the precise curing time. Nonetheless, most epoxies take 24 hours to dry to the touch and 48 hours to cure fully. So, leave the castings for at least 24 hours before you handle them.

Before you leave the molds to cure, cover them with a clean cloth. This prevents dirt and other pollutants from settling on the resin as it cures.

9. Remove the Coasters from the Molds

Once the epoxy is fully cured, you need to demold the coasters. But first, check whether the resin has cured fully or not. If the molds are still flexible and bendable, then the curing process is not yet complete. In that case, you should give them more curing time.

When you ascertain the epoxy is fully cured, gently bend the castings. And since you had used a mold release agent, they will come out easily.

10 Finish Your Coasters

In most cases, cured epoxy comes out strong with a smooth surface finish. However, that will not always be the case! In some instances, they may have sharp or dull edges that can scratch the tabletop. To smoothen off those edges and get a better finish, you need to polish the coasters.

To accomplish that, wet sand the edges or use fine-grit sandpapers. Continue sanding them until you get smooth and uniform edges.

What is Resin Coasters Used for?

Coasters offer an elegant way of decorating your tables while protecting their surfaces. With their impressive durability, they safeguard tables from cold or hot drinks. Even better, they are water-resistant, thus protecting them from moisture as well.

That’s not the only way you can use epoxy coasters though!

Instead, coasters give DIYers limitless opportunities. Thanks to their durable and sturdy nature in curing. You can use them for other tasks like creating mosaic and sealing loose surfaces. On top of that, they’re ideal for creating homemade floors and preventing peeling and sealing.

Conclusion

The bottom line, coasters are attractive, beautiful, and useful items. That’s why they’re commonly used for functional and decorative purposes. And hopefully, now you can craft your coasters by following the steps highlighted above.

So, don’t shy away from giving this fun and exciting activity a try.

FAQs

1. What does resin not stick to?

There are certain materials that epoxy will not adhere to. Some of these surfaces include; nylon, polypropylene, Mylar, and Teflon.

2. How much epoxy does one need to make 4 coasters?

The amount of epoxy needed for coaster making will vary depending on the shape and size of the coasters. However, 60ml of epoxy can make about 4 coasters.

3. Why resin coasters become sticky?

Resin coasters can become sticky because of various reasons. For instance, if you leave the resin to cure at a low temperature, it will become sticky. The same can also occur because of inaccurate mixing of the resin and hardener.

4. Are resin coasters waterproof and heat resistant?

When the resin cures fully, it becomes both heat- and water-resistant. That’s one of the many reasons they are used to cover table surfaces.

5. How much heat can resin coasters tolerate?

Cured resin can withstand temperatures ranging from 150 – 300 degrees Fahrenheit. However, some products can tolerate more temperatures than that.

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