Five Things You Should Never Set In Resin - Resin Obsession (2023)

Five Things You Should Never Set In Resin - Resin Obsession (1)Adding trinkets to resin is an easy way to make your resin crafts special.

One of my favorites is adding a child’s drawing to jewelry. And then there was the time I added watch gears to resin dominoes. And who doesn’t love adding stickers to resin to make Kawaii resin charms.

Your possibilities are endless.

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Well, almost.

While there is so much you can add to resin, there are a few things you shouldn’t. Ever.

Here are five things you should never set in resin:

Five Things You Should Never Set In Resin - Resin Obsession (2)

Fresh flowers

Fresh flowers will turn colors in resin. They can do anything from go clear to turn brown after putting them in resin. Believe me. I’ve tried it. You can see here what happened when I added fresh flowers to resin.

So what do you do instead? If you want to use flowers in resin, you must dry and preserve them first.

⭐️ BONUS: How to preserve flowers in resin.

(Video) Resin fail - what happens when you color resin with the wrong thing

Anything you might want to get back out later

While photos, mementos, and heirlooms look great when embedded in resin, think twice before putting them in your epoxy resin casting. Once you set something in resin, it will be almost impossible to get it back out of it. Especially without destroying your memento in the process.

What can you do instead? Make a copy of your item (especially easy in the case of photos, tickets, notes, etc.) and include that in your epoxy resin.

⭐️ BONUS: How to seal papers for resin.

Fresh food

Fresh food items with high water content, like fruit, will rot and turn disgusting in resin. You must dehydrate your food first. Even then, it’s challenging to make something beautiful. Food releases bubbles into your curing resin, makingit hard to see what you’ve got in there.

What’s another option?

Create a food lookalike with clay, then set that in resin. Clay and resin go great together.

(Video) Expert answers to your questions about resin

⭐️ BONUS: You can see what I mean here: How to make a resin and polymer clay ring.


Resin hates moisture. And if you’re using quick-curing resin, it bubbles up and makes a mess. (Yes, I’ve found that out the hard way too.). It’s why the best way to color resin is using colors specifically designed for resin. Colors like acrylic paint or food coloring can cause your resin to cure bendy.

What if you want to change the viscosity of your resin?

You can add a solvent like alcohol or acetone to thin your epoxy.

⭐️ BONUS: Learn how to use those liquids to make cells in resin.

Five Things You Should Never Set In Resin - Resin Obsession (3)

Bugs and other small specimens that aren’t entirely preserved

Like flowers and fruit, animal specimens will rot if you set them in resin before preserving them first.

(Video) WHO SAYS CATS and RESIN don’t mix? 🤔

How do you preserve them?

We have a great discussion about this topic in our forum that will inspire you to give this project a try. How to embed a spider in resin.

⭐️ BONUS: Here are 10 things to put in resin.

Frustrated with your resin results?

Tired of spending your energy on making something you wouldn’t show anyone?I get it. I felt the same way when I started creating with resin 15 years ago. It’s why I wrote the ebook, Resin Fundamentals. I’ve taken my resin experiences and condensed them into an easy-to-follow PDF book for beginners to go from confused to confident with resin. It’s the book I wish I had when I started.

Unpublished Blog Posts of Resin Obsession, LLC © 2022 Resin Obsession, LLC

Like this post? You may be interested in The Simple Steps To Casting Resin In Silicone Molds

(Video) How to choose a resin - UPDATED 2020 - What kind of resin should I use? -Advice on what resin to use


What should you not put in resin? ›

You can put almost anything you want into Brilliant Resin! Paper, plastic, fabric, metal, clay, wood, natural elements, glitters and powders, and any combination of these elements work well. Things that contain moisture should be avoided, for example, fresh flowers and leaves.

What happens if you put fruit in resin? ›

Fresh food items with high water content, like fruit, will rot and turn disgusting in resin. You must dehydrate your food first. Even then, it's challenging to make something beautiful. Food releases bubbles into your curing resin, making it hard to see what you've got in there.

Can you put bugs in resin? ›

Insect and arthropod specimens in clear resin are a valuable tool for teaching entomology both in the classroom and in public outreach.

What resin sets the hardest? ›

Liqcreate Strong-X. Liqcreate's Strong-X is perhaps the toughest resin on this list. Boasting a 91 MPa tensile strength and 135 MPa flexural strength, it can easily be applied for heavy-duty uses. Strong-X also provides high-temperature resistance, enough even for injection molding applications.

Can you put fairy lights in resin? ›

Yes, battery-operated fairy lights can be placed inside resin and displayed properly.

What happens if resin touches your hands? ›

Both epoxy resin and hardener can cause acute contact dermatitis. Discomfort can be severe but usually disappears after stopping contact with the irritant. Repeated skin contact with resins and hardeners may also cause chronic contact dermatitis, which is usually milder but longer lasting.

Can bacteria grow in resin? ›

Ion exchange resin beds are often an attractive growth medium for biological organisms, such as bacteria, mold and algae. In some cases, these growths can build up in the resin bed and physically foul the resin.

Can you put a picture in resin? ›

You want to wait about 40-50 minutes before adding your photo to the resin mix, and gently place it on top and press it down slightly with your fingers. Doing this will mean that minimal bubbles if any get stuck behind the image. Once your image is in place you can then add another layer of resin.

What happens if you put live plants in resin? ›

If you've ever had beautiful flowers, you might have thought about ways to preserve them. You might even be asking yourself if you can put fresh flowers in resin. Here's the short answer: NO. Within seconds of hitting the resin, they will shrivel and turn brown.

Can you put a butterfly in resin? ›

Once you've displayed your butterfly, you might want to think about pest control. You can use fumigant strips, mothballs, or little cedar planks and insert them in and that should keep the pests away. What is this? Also, you can preserve a butterfly in resin.

Do flowers rot inside resin? ›

If there is moisture, the resin might not cure properly, and the flowers will rot overtime inside the resin. You have to make sure your flowers are completely dry before using them in resin. If there is any moisture retained in the flowers, they will turn brown inside the resin.

What hardens resin faster? ›

Increase the temperature: The ideal temperature for curing ArtResin to 75-85ºF / 24-30ºC. Cure time is affected by temperature: warmer temperatures facilitate curing and colder temperatures slow curing. Place a space heater or heat lamp near your piece to encourage the resin to cure faster.

What is the safest resin? ›

ArtResin is the most popular brand of clear epoxy resin used by resin artists worldwide. ArtResin is ASTM certified (D-4236) non-toxic, non-hazardous, non-flammable, as there are no VOCs / fumes produced. ArtResin has only a low odour and is applicator friendly.

What kind of resin cures the fastest? ›

You might be in a situation where you need a project to cure quickly. In that case, you will want to use a quick-curing polyurethane resin. These usually fully harden in under thirty minutes, so you can make a project and have it ready to use or wear in under an hour.

What glitter does not sink in resin? ›

Iridescent flakes are a nice option that don't always sink, and often will float nicely in some resins.. Some metallic flakes are also better at floating in different resins. Each product works differently in each resin, so you may need to experiment for the specific look you are going for.

Can you make resin glow in the dark? ›

Alternatively, you can use the volume of resin to figure out the correct amount of glow powder to add. The standard ratio to use is 1 part glow powder to 4 parts resin. More or less won't hurt anything, but this ratio will get you a fantastic glow without wasting additional powder.

Can you pour candles in resin? ›

From tea lights and incense to votives and pillar candles, you can use resin to build a holder of any kind and shape. Before you look into making your own candle holder and candle trays, there are some things you should keep in mind about resin and high temperatures.

Can resin poison you? ›

Poisonous Ingredient

Epoxy and resin can be poisonous if they are swallowed or their fumes are breathed in.

Is resin toxic once cured? ›

Once Craft Resin is cured, and has fully hardened, your resin project can be used safely as a food contact surface.

Can resin get you sick? ›

Poisoning can occur from swallowing plastic resin hardener. Resin hardener fumes may also be poisonous.

What can damage resin? ›

Sunlight, ozone, chlorine, exposure to air — all these things damage resin over time.

Is resin cancerous? ›

Cancer: Older epoxy resins caused skin cancer in laboratory animals. This may have been due to epichlorohydrin, a contaminant that can probably cause cancer in humans. Most newer epoxy resins, which contain less epichlorohydrin, do not seem to cause cancer in animals.

Why resin is toxic? ›

Resins also naturally give off fumes, and unless you work in a well-ventilated area, molecules from the fumes will get into your lungs and cause irritation there, too. Harmful when exposed to eyes or ingested: Never let resin near or into your eyes or mouth unless they're specifically marked as non-toxic.

Can you touch resin with your hands? ›

If you accidentally get resin on your hands, wrists or arms, it needs to be removed right away to avoid possible skin irritation reactions. Epoxy resin is sticky, so it's important to use the correct cleanser to remove it. Hand soap and water will not remove resin entirely from your skin.

Can you put real sprinkles in resin? ›

Resin jewelry is easy to make, and endlessly customizable. I used an epoxy resin kit and some simple jewelry making techniques to make resin jewelry filled with real sprinkles as favors for the Sprinkles birthday party.

Does resin art break easily? ›

Under normal circumstances, fully cured resin doesn't break easily. In fact, it shouldn't break at all. Resin doesn't spontaneously break without something going wrong first.

Can I put fresh leaves in resin? ›

Place the leaf into the mold, using a toothpick to submerge it in the resin, including any tips that may want to stick out. Pour the second coat of resin over top to cover the leaf. Quickly pass a heat gun or torch over top to pop any bubbles.

Can you put dried flowers in resin? ›

Can you put dried flowers in resin? Absolutely! You can use casting resin with dried flowers. You'll obviously need to dry (and potentially press) the flowers first before using them.

What happens if you put non dried flowers in resin? ›

The first question that comes to mind is, can fresh flowers go in resin? The answer to this question is no, as fresh flowers are organic and if you fail to dry them completely before you put them into the resin, they will turn brown and rot. The solution to this problem is to dry your flowers first.

Can I inject resin? ›

Resin Injections are designed for injecting cracks in concrete and masonry where there is a need to consolidate a structure or exclude water and air from contact with reinforcement. Cracks greater than 0.2mm in width are injected with Low Viscosity resins. Wider cracks are injected with a Thixotropic resin.

Can you apply resin with a paintbrush? ›

Yes, epoxy resin can be used as a glue. In fact, it may be the strongest glue you will ever use! Mix and stir as usual, and apply as necessary with a brush or foam brush.

Can I put toys in resin? ›

You can embed all kinds of objects into epoxy resin - it works great!

What happens if you pour resin in the sink? ›

Basically, anything where the resin will contaminate water. Never, ever, ever include unused epoxy liquids in your trash. Never, ever, ever run containers and utensils through your dishwasher.

How do you get the ocean effect in resin? ›

How do you make resin look like the ocean? You're going to tint resin with shades of blue paint or alcohol ink, and pour in layers on your surface. You can then apply resin mixed with white paint, and blow around with a hair dryer for unique sea and wave effects.

Does food rot in resin? ›

Yes, you can use ArtResin epoxy resin on food without it rotting, so long as you cover every square inch of the item to protect it from the air. Once resined, your food will look as fresh as the day it was resined (though it should not be eaten, obviously).

Can you put succulents in resin? ›

Step 3: Add Succulents

It's a quick and easy resin project (perfect for beginners) so if you haven't tried resin before don't let that hold you back! Once you have your succulents ready to go start with your larger pieces.

How do you keep flowers forever in resin? ›

To prevent the resin from reacting with the flowers they need a protectiv sealing. A simple way to do that is by covering the flowers and leaves with a layer of clear drying glue. Just add some water to the glue and mix evenly.

Why is my resin still soft after 24 hours? ›

As a general rule of thumb, your epoxy resin should feel well-cured after 24 hours. However, a complete cure and maximum hardness can take anywhere between 7-10 days, depending on the resin type. The most common reason for a tacky, under-cured project is inaccurately measuring your resin.

Does resin harden faster in cold? ›

All epoxy resin/hardener combinations go through the same phases of cure. All combinations cure faster at warmer temperatures and cure slower at cooler temperatures. In cool temperatures, more time is required to achieve the same degree of cure, or cross-linking, as occurs in a shorter period at higher temperatures.

Which resin is toxic? ›

Epoxy resin is toxic to marine life and ecosystems. If liquid or uncured epoxy is disposed of in sewers, drains, or your household garbage, these habitats and creatures can die off. Bottom line, Never throw away liquid or uncured epoxy in your trash or pour it down a drain.

How long is resin toxic? ›

Wait at least seven days and keep the room well ventilated to ensure that any lingering harmful fumes have time to dissipate. After seven days, your new floor should be fully cured and ready to serve you well for years to come!

Is resin jewelry toxic? ›

In its liquid form, resins are toxic. Breathing in certain types of resin fumes for prolonged periods or getting it on your skin can lead to serious health issues such as asthma, dermatitis, and eczema, according to the Occupational Safety and Health Administration.

At what temperature does resin cure best? ›

One of the most important factors to ensure your epoxy resin cures properly is temperature. The best temperature for both your ArtResin and your workspace is slightly warmer than room temperature: 75-85F or 24-30C.

Can you cure resin for too long? ›

Yellowing of prints: If you notice that your prints are starting to yellow or get discoloured, then you've exceeded the necessary curing time. Brittleness: A brittle resin print is a sign that you may have left the print in the curing station for too long.

Why is my resin sticky after drying? ›

Sticky, tacky resin

This is often caused by inaccurate measuring, not mixing thoroughly or by curing in cold temperatures. Try moving your piece to a warmer spot: if it doesn't dry, re-pour with a fresh coat of resin.

What does resin not bind to? ›

Anything that has a waxy, oily, or greasy coating, will not bond to resin. But, remove the grease, and you'll turn the surface from one that resin won't stick to into surfaces resin will stick to.

What part of resin is toxic? ›

Resin's that contain VOC's are classed as toxic because the heat given off during the curing process lowers the boiling point of the VOC's causing them to give off toxic fumes and vapours. Resins that contain VOC's generally have a strong odour or smell to them.

Can you put candy in resin? ›

The first step in casting any candy in the resin is to prepare the candy. If you just put the candy in the resin as it is, the candy will dissolve in the resin and that doesn't look very pretty! To keep the candy intact, with pretty, crisp lines, you have to coat it with Resin Spray Finish first.

Is resin still toxic once cured? ›

As we will discuss in the following section, there are ways to safely dispose of uncured liquid resin. However, it is much easier and safer to dispose of hardened, fully cured resin, which is much less toxic and therefore less harmful to humans and the environment.

What causes resin to not harden? ›

This is often caused by inaccurate measuring, not mixing thoroughly or by curing in cold temperatures. Try moving your piece to a warmer spot: if it doesn't dry, re-pour with a fresh coat of resin.

Does resin stick to Vaseline? ›

Vaseline will work well too. It can be a bit greasy, so keep the layer light.

Is resin toxic to breathe? ›

When epoxy fumes are inhaled, they can affect the nose, throat, and lungs. Most symptoms from the inhalation of epoxy involve inflammation and therefore irritation of the nose, throat, and lungs. Repetitive and high amounts of exposure to these fumes can result in sensitization and asthma.

Which resin is least toxic? ›

ArtResin is the most popular brand of clear epoxy resin used by resin artists worldwide. ArtResin is ASTM certified (D-4236) non-toxic, non-hazardous, non-flammable, as there are no VOCs / fumes produced. ArtResin has only a low odour and is applicator friendly.

Should you wear a mask when working with resin? ›

When sanding, grinding, or drilling resin, wear a particle mask or a NIOSH respirator approved for dust. It is important not to inhale the resin dust, which could cause an allergic reaction.


1. Resin safety - How do you know if your resin is safe to use?
2. How to prepare the edges of panel for resin painting
3. Tour the Resin Obsession studio
4. Ideas for Items to Include in Resin Jewelry
5. Tricks and tips for getting bubbles out of resin
6. Beginner questions about resin - Part 1
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