Doming resin casting resin

doming resin casting resinWhat’s the difference between casting resin and doming resin?

This difference is important to know for your resin success! Depending on what you want to make, choosing the right resin for your project is important so that you can get the results you want.

Let’s start with a couple basic concepts

A doming resin mixes thick enough that when you use it, it finishes in a smooth dome on your project. If you think about it like a teardrop, when you drop doming resin onto a surface, it will stay in a domed shape. A doming resin is what you want to use when you want a curved surface to something or if you want to use resin on a surface where there are no sides to keep the resin contained. The surface tension of doming resin will be enough for it to want to stay on the surface.  Note:  The larger the surface, the harder it is to keep resin on that surface, even if it is a doming resin.  

A casting resin mixes in a thinner viscosity. It is meant to be used in something with sides like molds. This thinner viscosity is what makes casting resins ideal for spreading into all the intricate parts of a mold.  You could also use a casting resin a bezel, but is is not going to have a domed finish.  Casting resins also do not self-level like doming resins do.  This means that casting resins will not necessarily level themselves out over a surface.

When would you use a doming resin?

A doming resin mixes in a thicker surface tension and is going to stay on the surface of something without sides. For example, if you want to do resin for artwork, you want a doming resin so that it will (mostly) stay on the surface of your painting.

All of these paintings are made with a doming resin: Resin painting studies

Doming resins are important if you want to make jewelry with a domed finish. You can see a few examples of using a doming resin to make jewelry with and without a bezel here:

Domino resin pendant tutorial

Resin pendant ideas

Note:  The larger the surface, the less likely you are to keep all of your resin contained, even if it is a doming resin.

When would you use a casting resin?

Casting resins are meant to be used for just that – casting. You should pour them into something that has sides to be able to contain it. They can be poured into deep layers if desired. Since they don’t mix as thick, removing bubbles from this resin is easier compared to a doming resin.

Here’s how to use a casting resin to make resin bowls.

Can you use doming resins and casting resins interchangeably?

Yes, but you may not get the results you want. Doming resins are meant to be cast in no more than an eighth inch depth to allow bubbles to easily escape. You can cast a doming resin in a thicker layer than that, but it is likely to retain bubbles. If you are using a deep or intricate mold, it may be hard for you to get all the bubbles out before it starts to cure.

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A casting resin can be applied to surface without sides, but because it mixes thinner, it will not want to stay as a complete mass. It will continue to spread out and will produce the dreaded ‘fish eyes’.

What should I notice when I’m mixing these resins?

Doming resins will mix to the consistency of syrup. Casting resins will mix more like water. If you create bubbles during mixing, more will escape on their own in a casting resin.

How do I know if I’m buying a casting resin or doming resin?

When you buy a resin, it is going to be one or the other. If it that information isn’t on the packaging, ask! For the resins sold on Resin Obsession, we have that information in a PDF link in this article: resin casting

Can I apply multiple layers of doming resin or casting resin?

Both will take additional layers. You can wait until the previous layer is fully cured before applying the next layer, or if you only wait until the previous layer starts to gel, you can pour the next layer and minimize the lines between them.

If you want to see differences between doming resin and casting resin, this video shows you:

What other questions do you have about using casting resin or doming resin?

You can buy both kinds of resin here.

Unpublished Blog Posts of Resin Obsession, LLC © 2018 Resin Obsession, LLC

23 thoughts on “Doming resin casting resin

  1. I’ve been trying to coat polymer clay earrings that I put an image on to (baked in) with the doming resin and find that many times when I think I’ve put enough on it starts to pull back from the edges (no rims on the earrings) or leaves a dry spot. If I try to correct this after the resin hardens it doesn’t blend in. Any suggestions? BTW this video is great.

  2. I have seaglass, small shells and some pottery shards glued to an old window and want to use resin like grout for the mosaic. I am still not sure if I need doming or casting. I have not used resin before

  3. Why can’t you use some resins on wood? I’ve got a table and the top is timber Pailings with a gap between each one. I know it’s a design feature but it’s not good for crumbs. I want to pour resin into each gap. But I think I’ve bought the wrong product. It’s called Kleer Cast by Norski

    1. Some resins shrink too much after curing and can pull away from the wood. What kind of resin is Kleer Cast? I’m not familiar with that one.

  4. if my resin is gooey after curing time what do I do, or what can I do. I did a 6 pane window with seaglass I want to hang inside but it i hang it will it run?

  5. Hi, and thanks for all the helpful advice above.
    I am trying to make some drink coasters on ceramic tiles. The painting part is fun and works out well. However, I can’t get any resin to go hard enough to withstand a hot coffee cup without getting indentations from the cup base. Even after 2 weeks it still happens. The only doming resin in my local (ie. New Zealand) hardware store is by Norski. I have also tried a casting resin and a clear polyurethane varnish. Any ideas?

  6. Thank you for responding, your answer really helped. I am VERY new to this, but I’m also very eager to expand my creative side with resin! After watching your vid, I also learned that I’m going to have to make a contraption of some sort to rotate the piece (a mannequin head) 180 degrees throughout the process which will be tricky because I need the resin to cover the entire piece, top of the head to the base.

  7. I have mistakenly bought the casting resin to seal artwork. One coat and I see the non coverage. If I put another coat of this resin will it eventually make a smooth coverage? Or do I have to get some doming resin to do the next coat?

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