Epoxy resin is cloudy! What to do?

Epoxy resin is cloudy! What to do?

One day you may receive the parcel with epoxy resin, but after taking the goods out of the box, you may
be unpleasantly surprised that the resin has become «cloudy»: instead of the claimed crystal-clear
colour, you see a cloudy shade and/or white flakes in the sediment at the bottom of the bottle.


Resins produced by different manufacturers differ in composition and properties, so they can also react
differently to environmental conditions. Since our epoxy resin is produced in Italy, in the Liguria region,
it is assumed that the resin will be stored in a suitable climate.
However, the United Kingdom is distinguished by lower temperatures in autumn, winter and spring,
therefore, during these seasons (and sometimes even in rainy and cool periods in summer), the resin, or
rather component “A”, can acquire a cloudy shade: from light, barely noticeable to saturated “milky”
with a dense sediment at the bottom or with dense clots in the thickness of the resin.

Epoxy resin is cloudy! What to do?
For comparison: cloudy resin (left) and clear resin (right)

Can one work with cloudy resin?

Not without fixing first! Castings made from cloudy epoxy resin can have a number of defects after
curing, and your resin makes can no longer be salvaged. The most common defect is the flexibility of the

What to do?

First of all – do not panic. Cloudy epoxy in cold weather is a normal phenomenon, it is the same natural
phenomenon as freezing of water in winter in reservoirs. But as soon as spring comes, the ice begins to
melt. Almost the same thing happens with resin, albeit with some nuances: the resin “freezes” at higher
temperatures than water (at 15-20 ° C), and for its “defrosting” temperatures higher than those
recommended for its storage are needed: 50 -70 ° C.

To turn the cloudy resin to its original transparency, you need to put a tightly closed bottle / canister in a
container with hot water (50-70 ° C) for 30-40 minutes until the turbidity disappears completely. This
time period is indicated for small volumes, but if you need to warm up an entire can of resin, it will take
about an hour. You can check the transparency of the resin in the cans using a flashlight. Also, in order
to eliminate the turbidity of the resin in large volumes, it will probably be necessary to change the
cooling water to hot water a couple of times.

HOWEVER: even if the resin has begun to gradually become transparent, you should not immediately
pull it out of the hot water. The resin must lie in it for some time for the “thawing” process to be
successfully completed. A perfectly clear colour is an indicator that the resin can already be used.

After such hot water procedures, the resin can be used again for its intended purpose without the risk of
getting jewelry and paintings with defects

One comment

  1. Very nice write-up. I definitely appreciate this site. Thanks!

Leave a Reply

Your email address will not be published. Required fields are marked *

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Time-tested quality.
We produce and sell epoxy resins since 2015. Thousands of successful projects were made with our products around the world.
Since we are directly a manufacturer, we have access to a professional laboratory that will happily help you with any complex project.
Free economy delivery + Discounts for regular customers
Mainland, Northen Ireland, Scottish Highlands, Scottish Islands. All the other islands - are not included.

RESIN PRO 2024 COPYRIGHT all rights reserved