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Seashell Coaster Tutorial

Love collecting shells? Here's a great project using the new Mermaid Trash 32oz epoxy resin kit, to turn those moments on the beach into forever keepsakes 🥰

Check out the video below with step by step instructions and list of materials.

For this project you'll need:

  • Mermaid Trash epoxy resin 32 ounce kit. MT resin kits are for US customers only. BUT, if you want a little slice of Florida for your own mermaking creations, for a limited time only on the MT site, I have both Florida sand and seashells ready to ship anywhere in the world

  • This 6 cavity mold. It's pretty inexpensive and is the perfect size for coasters

  • Epoxy resin pigment in the color of your choice. I used Mermaid Trash pigment drops in turquoise because it's a nice light color you are able to see the shells through. If you use mica, it will be less visible.

  • A selection of seashells and I also added these abalone chips:

  • Some well dried beach sand.

  • Cork bottom:

  • Optional: Mermaid Trash foam or lace white pigment paste and silicone masking fluid:




  • Start by mixing up some epoxy resin. I did about 5 ounces. Then slowly add in the beach sand until it becomes a thick grainy mixture.

  • Sand often darkens when you add it to resin. To keep my sand nice any light I add a small amount of foam or lace white to brighten it back up.

  • Pour into your prepared mold and allow bubbles to rise. Torch or use alcohol (Mermaid Trash cell activator is the best!)

  • Add in your seashells and allow the resin to reach about half cure, or enough so that the sand and shells don't rise up when you do the next step.

  • Mix up some more resin and add in your pigment. Just a little at a time until you reach the desired color. Remember that you want to be able to see through to the color of the seashells below. Too much color and you'll cover them up.

  • Pour this mixture over your sand and shells. Allow to cure completely before moving on.

  • Demold coasters and lightly sand the top and sides.

  • Tape off or use masking silicone on the bottom of the coaster to prevent drips

  • Mix up one last batch of resin and apply a thick top coat to each coaster, pouring from the center and allowing the resin to spill over the edges.

  • Once cured remove the tape or silicone and finish with a cork bottom!

Enjoy the short video below and when shopping the Mermaid Trash website use code: savethesea for 10% off your entire purchase.

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1 Comment

Angela Cash Dooly
Angela Cash Dooly
Aug 10, 2022

Hello! I want to make some of the ocean coasters with seashells, however, you are out of stock on the turquoise expoxy resin pigment. Is there anything else that I could use in place of this until your replinishment is ready to sell?

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