Remove sharp edges of epoxy

Are there sharp edges on your epoxy artwork and do you want to get rid of them? Our experts share their top tips for epoxy finishing.

When you remove epoxy from the silicone mold, there may be sharp edges on the artwork. This is because epoxy shrinks slightly during curing. As a result, a silicone mold filled to the brim suddenly appears less full after curing. Epoxy rises slightly at the edges of the silicone mold, which causes the sharp edges. Fortunately, there are several methods to tackle these edges, each with different results.

1. Preventing edges

The best approach is to prevent these edges. That is probably the reason you are reading this article, so we will quickly explain how to do this. Fill the silicone mold slightly too full, so that a slight bulge is created on top of the silicone mould. Mix a small amount of epoxy and wait for the epoxy mixture to thicken before filling the silicone mold. Thicker epoxy is less likely to overflow and is therefore better suited for applying the final layer. Make sure that the mold is completely level to prevent uneven distribution. Also be careful not to let the epoxy flow over the edges.

2. Use a deburrer

Special tools are available for cutting edges, such as deburrs . This tool has a handy little sharp blade that allows you to carefully remove the edges. The big advantage of this method is the speed. However, after cutting, a dull line may remain. You can make it shine again with some nail polish or by sanding and polishing the edges, although this is similar to the sanding method mentioned earlier.

3. Epoxy domes

An easy way to get rid of edges is to doze . This means that you pour a thin layer of epoxy resin on top of your work of art, which causes the edges to disappear. This technique is especially useful when making epoxy coasters and keychains.
You can read all about this on the next page: epoxy doming .

4. Sanding and filing

You can also sand or auction off edges. You can do this very carefully with sandpaper or a nail file. For larger edges, good sandpaper provides a better result.
For larger projects such as a table you can also use a sander. This allows all edges to be sanded away in one go. After sanding, the surface must be polished or doped before it will shine again. Sanding and then polishing is a slightly more difficult method and is only recommended if you have the right equipment, such as a combination tool .

With these tips and techniques you can easily remove sharp edges from epoxy castings and ensure a perfectly finished result.

More information?

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

Contact itsOkay customer service or take a look at the Epoxy knowledge center .


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