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UV Resin - Complete manual

Ready-made UV resin is extremely popular. This resin is easiest to use and hardens within 1-2 minutes. In this article we answer most questions about UV resin.

What is UV resin?

UV Resin is an epoxy that you do not need to mix . You pour this epoxy resin directly from the bottle and it hardens within 1-2 minutes . With a normal epoxy you work with a mixing ratio of, for example, 1:1 or 1:6. This often only takes effect within 24-48 hours. Mixing also often goes wrong, causing the epoxy to no longer harden. You do not have this problem with ready-made UV Epoxy and you do not have to wait 24-48 hours!

UV resin is produced by means of UV light. This can be done under a UV Epoxy lamp or simply in direct sunlight or cloud cover.

What is UV resin suitable for?

UV resin is perfect for making small objects such as jewelry, keychains and other art. This is because it only takes a few minutes to harden. Normal 2-part epoxy takes 24-48 hours to dry.

Jewelry and art

UV resin is especially for making epoxy jewelry, small works of art or applying a coating/protective layer to jewelry, happystones or polymer clay earrings and other art. This epoxy has been ordered by more than 25,000 customers and has 750+ reviews.

Coating/protected layer

Ready-made UV resin is widely used for finishing polymer clay earrings, miniature construction, fimo clay, happy stones and more. Easily create a beautiful glossy topcoat layer that also provides extra protection for your artwork.

Above you see three different examples of customer reviews, which can be found on the product page of itsOkay UV resin.

In the left photo you see polymer clay earrings made by Lucienne who finished them with UV Epoxy. This gives a shiny result.

In the middle you see a ring from Carel. The goldsmith had placed a cast silver monogram on a memorial ring / ash ring and this was filled with the ready-made epoxy with the addition of pigment. Because the choice was not transparent, but opaque, it now resembles a stone, so that it has become a kind of signet ring.

The third photo shows a hand-decorated oyster from Claudia. She used to use boat lacquer but finds the UV Epoxy easier and more beautiful.

As you can see, you can go in any direction with the ready-made resin. Not quite sure whether this epoxy is suitable for your project? Please ask us via info@itsokay.nl or look at the product page of the mold you want to use. Here we indicate which epoxy is best to use for that specific mold.

How does UV resin harden?

Cure UV resin in direct sunlight

Ready-made UV resin therefore requires UV light to harden. In the summer under direct sunlight it can happen very quickly: the epoxy is hard within a few minutes . In winter when it is cloudy, it can take a long time for it to harden, such as at least 45 minutes or even an hour. We do not recommend this.

Cure UV resin under UV lamp

It is easiest to use a UV lamp. Preferably use a UV lamp for epoxy such as the one below. By using a UV lamp you are not dependent on the weather and the curing of UV resin is lightning fast . You can use this lamp at any time.

With a UV lamp of, for example, 36 watts or UV Epoxy lamp 84 watts, this can be done very quickly: curing takes less than a minute. These lamps are stronger, but our advice remains to build your work in layers and to harden each time.

The above UV epoxy resin lamp is specially designed for good, even curing of all types of UV Resin. Here too, build up in layers and turn your mold over so that the bottom also hardens properly.

Is UV resin UV resistant?

UV resin from itsOkay has good UV resistance. This means that this epoxy can withstand UV radiation. Unfortunately, some UV Epoxy casting resin has good protection against long-term exposure to UV light such as sunlight. Over time, transparently cast works of art will yellow.

Tip: prevent yellowing by mixing color pigment with epoxy.

Differences between UV resin and epoxy resin

1. Ready-made UV resin

UV resin is, as the product name suggests, ready-made . This does not need to be mixed and hardens within 1-2 minutes using UV light.
This epoxy resin is ideal for making small works such as jewelry, key rings or to use as a coating/protective layer for happystones, polymer clay earrings and jewelry.
The advantage of UV resin is that it works quickly. UV resin hardens very quickly. So you don't have to wait 24-48 hours for it to harden. This allows you to continue working faster. The disadvantage of this epoxy is that it is more expensive than normal epoxy casting resin.


Make sure you pour thin layers and let it harden in between. The recommended thickness is a maximum of a few millimeters per casting. Make sure you always use a transparent silicone mold with this epoxy, so that you can also let the bottom harden.

2. Two component epoxy

A two-component epoxy such as the Epoxy casting resin 1:1 and the UltraEpoxy consist of 2 parts. These must be mixed together in a certain proportion. If you deviate too much from this ratio, there is a chance that it will not harden properly. These epoxy resins are used for larger projects such as coasters, photo frames, as a coating for tables and objects, floors and paintings. But it can also be used for smaller works of art.

These epoxy resins must cure for at least 24-48 hours. You can pour our epoxy up to a thickness of 2 cm. The advantage of epoxy casting resin is that it almost always hardens nicely and it is relatively cheap. To determine which epoxy works best for you, you need to look at what you want to make, how much time you have and how much epoxy is needed for your artwork.

Help! My UV resin does not harden

Have you started a nice project and just want to let it harden? This can have several causes. Our UV resin has been extensively tested by various experts and thousands of customers (750+ reviews). So it certainly does harden, if used properly. If this is not the case, then something went wrong.

1. Not cured long enough

UV resin hardens using UV light (sunlight). This means in direct sunlight and this even works when it is cloudy. UV resin does not dry indoors in front of a window.

When the sun is shining, UV resin hardens within 10-15 minutes and when it is cloudy about 30-45 minutes. Then turn the silicone mold over and let the bottom harden as well. The epoxy dries within 1-2 minutes under a UV epoxy resin lamp .

2. Too much pigment used

It may happen that you have used too much dye or that you have used pigments from brands that are not intended for epoxy. If you have used too much pigment, this can cause the composition of the resin to no longer be correct. This prevents the resin from curing properly. The packaging of epoxy color pigment states how much you can use.

Do not use dark colors such as dark purple or black. UV light cannot penetrate these colors properly and therefore the UV resin will not harden. Alcohol ink is also not suitable for UV resin.
UV epoxy pigment


Always mix dye with the epoxy in a mixing cup before pouring it into the mold. Especially with a liquid dye that is not mixed properly, watery spots may remain, which will then not harden.
You can also have this problem with epoxy pigment powders.

If you use a dark dye such as black, the UV light will have difficulty getting through, causing it to harden less well.

Glitter is great, but too much epoxy glitter (yes, it is possible) is not good for UV epoxy. This means that the UV light no longer penetrates the glitter and UV epoxy, so it no longer has a chance to harden.

3. Too thick layer poured

It is best to build your work of art from several layers of a maximum of a few millimeters thick and let it harden in between. The thicker the layer, the more difficult it is to harden. Especially when it contains a dark epoxy dye or glitter.

4. Wrong type of epoxy mold used

Always use transparent molds for the UV Epoxy. This is because you also have to place the bottom of the mold in the UV light to get the bottom to harden properly. With a mold that is not transparent, the UV light cannot penetrate the bottom, which means it will not harden properly.

And finally, there is always the possibility that the UV lamp you use does not work well for epoxy or is too weak.

Prevent stickiness of UV resin

Stickiness is common. Fortunately, this is easy to solve. Because we want to provide the best tips, we continuously test these types of problems. The cause of this is usually that the epoxy has not hardened (properly) or that too much epoxy pigment has been used. In certain cases, the humidity can also be too high.

To prevent sticky epoxy, our advice is to pour in thin layers and let them harden in between. So you don't fill a silicone mold in one go and you don't apply a thick layer to your coastal work.

Tips for sticky UV resin

  • Allow the epoxy to cure longer than stated on the epoxy packaging.
  • If this does not help, you can place your work of art in a bowl of water. Place the container with water in the sun or under a UV lamp and let it harden again: the stickiness will dissolve.
  • Apply a small amount of dishwashing liquid or alcohol to your work of art and then rinse it dry under the tap. The stickiness will disappear.
  • Apply a new coat of epoxy, varnish or nail polish to the sticky layer.

More information?

Do you have questions about making art, jewelry or casting/coating floors or other objects? Several people work at itsOkay epoxy experts each with their own expertise. We are happy to help you.

Please contact the customer service from itsOkay or take a look at it Epoxy knowledge center .

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