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You can preserve a mushroom in resin by completely drying it first, then sealing it in a mold with a slow-curing epoxy resin.
This process locks in every detail, from the gills under the cap to the texture of the stem, so you can keep a special find forever.
If you’ve ever wondered how to preserve a mushroom in resin without it turning brown, rotting, or floating away, you’re in the right place.
Preserving a mushroom in resin is totally doable at home, and it’s one of the most rewarding crafting projects for nature lovers.
In this post, we’ll walk through the entire process, the best methods to dry mushrooms, and the exact steps to get a crystal-clear result.
Let’s dig in and get your mushroom immortalized in a beautiful resin block.
Why You Can Preserve a Mushroom in Resin the Right Way
You can preserve a mushroom in resin, but only if you control moisture and air bubbles carefully.
Fresh mushrooms are over 90% water, and that water will ruin your resin.
When moisture gets trapped inside cured resin, it turns cloudy, creates bubbles, and can even cause the resin to stay soft forever.
So the key to successfully preserving a mushroom in resin is making sure the mushroom is bone-dry before you even open your resin bottles.
1. Drying Is the Most Important Step
The best way to preserve a mushroom in resin starts with a dehydrator, not fresh mushrooms.
A food dehydrator at around 100°F (38°C) for 12 to 24 hours will remove all the internal moisture.
If you don’t have a dehydrator, you can use your oven on the very lowest setting with the door cracked open.
Another great trick is to use silica gel beads in an airtight container, which pulls moisture out without any heat.
Trust me, the longer you dry your mushroom, the better your resin project will look.
2. Preserving the Color and Shape
When you preserve a mushroom in resin, you want it to look like it did in the forest, not shriveled and pale.
To keep the color vibrant, you can lightly spray the dried mushroom with a clear acrylic sealer before embedding.
This helps lock in the pigments and prevents the resin from soaking into the stem and cap.
For shape, consider casting the mushroom in a slightly larger mold and then trimming the resin block later.
You’ll get a cleaner, more polished piece that really shows off the mushroom’s natural form.
Step-by-Step Guide to Preserve a Mushroom in Resin
Now that you know why drying is key, let’s get into the actual hands-on process.
Here’s exactly how to preserve a mushroom in resin from start to finish.
1. Choose Your Mushroom and Mold
Pick a mushroom that’s firm, not too brittle, and free of dirt or bugs.
You also want to choose a silicone mold that gives your mushroom a little breathing room on all sides.
A sphere mold, cube mold, or even a shallow tray works great for beginners.
If you want to hang your finished piece, insert an eye screw into the stem before casting.
2. Mix a Slow-Curing Epoxy Resin
For the best results, use a high-quality casting resin with a long working time of at least 30 to 45 minutes.
Fast-curing resin heats up too quickly and can damage the mushroom or create micro-bubbles.
Follow the manufacturer’s ratio exactly, and stir slowly in a figure-eight motion to minimize air entrapment.
Let the mixed resin sit for about 10 minutes so the bubbles can rise to the surface.
3. Pour a Thin Base Layer First
Pour a thin layer of resin into the bottom of your mold, just enough to cover the base.
Wait about 30 minutes until this layer becomes tacky but not fully cured.
Then gently place your dried mushroom on top.
This tacky base anchors the mushroom in place and stops it from floating to the surface.
4. Fill the Mold with More Resin
Slowly pour the remaining resin over the mushroom, letting it flow over the top naturally.
Pour in a thin stream from a corner to avoid trapping air under the cap.
Use a toothpick or wooden stick to pop any bubbles you see rising.
If the mushroom shifts, hold it down with a toothpick until the resin starts to set.
5. Cure and Demold
Cover your mold with a dust cover and leave it in a room-temperature spot for 24 to 48 hours.
Once the resin is hard and no longer tacky, you can carefully pop the mushroom resin out of the mold.
If you see any surface bubbles, you can sand them off with fine-grit sandpaper and apply a clear topcoat.
Common Mistakes When You Preserve a Mushroom in Resin
Even with the right steps, things can go sideways if you’re not careful.
Here are the biggest pitfalls and how to avoid them when you preserve a mushroom in resin.
1. Using Fresh Mushrooms
Never put a fresh, wet mushroom into resin.
The moisture will turn the resin milky white and cause the mushroom to decompose from the inside.
Always dehydrate your mushroom until it snaps like a cracker when bent.
That’s the only reliable way to preserve a mushroom in resin long-term.
2. Skipping the Pressure Pot or Torch
Bubbles are your biggest enemy in resin art.
You can minimize them by using a heat gun or a kitchen torch just above the poured surface.
The heat forces bubbles to burst, leaving your resin crystal clear.
If you’re serious about this hobby, a small pressure pot is a game-changer for flawless pours.
3. Rushing the Cure Time
Resin needs patience.
If you touch or demold too early, you’ll leave fingerprints or warp the mushroom.
Also, don’t place your mold in direct sunlight because UV rays can yellow the resin.
Wait the full cure time, usually 48 to 72 hours, before handling your finished piece.
4. Not Sealing the Mushroom
Even dried mushrooms can soak up resin, which makes them look translucent and dark.
To avoid that, apply a thin coat of Mod Podge or a spray sealant to the entire mushroom before you put it in the mold.
Allow the sealant to dry completely.
This barrier keeps the resin on the surface, so the mushroom keeps its natural look.
So, How to Preserve a Mushroom in Resin Like a Pro?
To preserve a mushroom in resin, you absolutely must dry it completely, seal it, and use a slow-curing epoxy resin.
The process is simple once you master those three pillars, and the results are absolutely stunning.
Start with a small, simple mushroom, and don’t be afraid to experiment with different molds and layering techniques.
Whether you’re making jewelry, paperweights, or just a keepsake from a memorable hike, preserving a mushroom in resin is a craft you’ll love.
So go ahead, grab some mushrooms from your backyard or local market, and start creating something magical today.