Alumilite Amazing Opaque White Casting Resin - 470ml / 16 fl. oz.

(9 Reviews)
£14.96 (Exc Tax)
£17.95 (Inc Tax)
Current Stock:
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The Amazing Casting Resin is really easy to use. It is a super-fast curing general purpose opaque-white urethane casting resin used for a wide variety of casting applications. It is ideal for fingerprint jewellery makers for reverse moulds. 

Its low viscosity and 1:1 mix ratio by weight make the Amazing Casting Resin extremely easy to use.  The cured resin can be painted, stained, dyed, drilled, and carved.

Super fast - it begins to harden in about 3 minutes, and can be de-moulded after about 10 min! You'll see it harden in front of your eyes, the translucent yellow starts to change into an opaque white, it is fascinating to watch. Great if you are impatient! Once cured, it can be painted with acrylic paint, stained, drilled and machined.

Resin must be kept dry and in sealed bottles at all times. TOP TIP FOR STORAGE: Keep the caps of each resin bottle on tight at all times. Even during use, pour out what you need, then put the caps back on immediately until your next use. This will keep your resin in good working condition for as long as possible. 

Ensure any moulds or tools are completely dry, any moisture will cause a bad foamy bubbly reaction. Don't use with water based dyes or colours, we recommend our Alumilite Dyes, or dry colours, like Pearl Ex

**Please note - final cured colours will be affected by the opaque white base. For example: a tiny drop of red mixed with the white will produce pink. The more colour you add, the brighter the red will be.

Approx 470ml (16 fl. oz.).


Some questions and answers for our more advanced users:

Why is my cast piece soft?
Typically, the reason your Amazing Casting Resin piece is soft is that the part you poured is small or thin and the resin was poured into a mould that was room temperature or even worse ... cold. The Amazing Casting Resin is exothermic, which means it generates heat as it cures. The resin needs this heat to cure properly. If the part is small and or thin and poured into a cold mould, it does not have the ability to generate the heat required to cure fully. So the material will gel and start to cure but not finish because it is lacking the heat necessary to finish curing properly. With your piece in the Amazing Mould Putty mould, simply place it in an oven at 60C or less for an hour, or place it under a heat lamp for a couple hours to supply the cast piece some heat in order for it to cure.
Is the Amazing Casting Resin cured piece UV stable?
No, like most resin it needs a UV protective coating. The Amazing Casting Resin is Opaque White and will yellow slightly over time if it is exposed to UV light. Clear acrylics or lacquers work well for protecting the resins from changing colour. There are two ways of applying paint to achieve the best adhesion. First paint the mould and allow it to completely dry before casting your resin. As the resin flows into the painted mould, it will chemically bond to the paint as the resin is curing and after the resin cures you will de-mould a perfectly painted part. Painting the mould prior to casting allows you to reproduce perfect detail by painting becoming the outside layer of the actual part rather than cover the exact cast replica with paint that could then cover up fine detail. The other option for painting your part is to paint the part as soon as you remove the cast part from the mould and after you remove any flash while the resin is still curing. Although the resin is de-mouldable, the casting resin is still curing and if painted during the first 5 or 10 minutes of casting the part, the resin will still crosslink with the paint to give you not only a mechanical bond but also a chemical bond between the paint and the cast piece. Paints have built in UV stabilisers which then block out the UV light from ever reaching the casting resin which could affect the colour.
Can I paint the Amazing Casting Resin piece?
Yes! We recommend lacquers or acrylics but you may also use synthetics or enamels. A lacquer primer may be needed to assure the long term effectiveness of the paint. You may wish to paint your silicone mould before casting. Paint the mould with a fast drying acrylic or clear coat. Once it is completely dry, cast your piece. When you de-mould the part you will pull out a painted piece. The Amazing Casting Resin will chemically bond to the dried paint. The other option is to paint the part as soon as it comes out of the mould while the resin is still curing to allow the curing resin to crosslink with the paint.
Why is my Amazing Casting Resin foaming or bubbling?
Moisture contamination in urethanes causes foaming. If it foams quite a bit, most likely the moisture is right in the Amazing Casting Resin. The moisture is usually in the A-side. There is not a fool proof method of removing moisture from your system. Typically the B side will crystallise when moisture is present. The A side, however, will not look any different.

Moisture is absorbed through the air and therefore is very important to put the caps back on the bottles as soon as you are done measuring out the amount you need for your next pour. Do not leave the caps off for any extended period of time.


Click here to view an MSDS sheet for this product.

Click here to view the Technical Data sheet for this product.

Regarding health & safety, we always recommend doing your own research, and make your own decisions on any precautions you need to take. Read the SDS and get advice if needed. We suggest ensuring you have good ventilation, and protect your skin and eyes (use nitrile gloves only, don’t use latex with resin). If you work with a large amount of resin, or work with it often, you might want to invest in a VOC filtered face mask.

Reviews (9)

amazing Casting Resin

Written by Leone on 19th Jun 2020

First time using for me in my silicone Mermaid mould. It's so easy and quick to use and does what it says on the packet! Amazing! Would definately buy again!


Written by Leone on 2nd Jun 2020

This was the first time using Amazing Casting Resin. It's very easy to use! Excellent results! Can't believe how quick!


Written by Stefan Crysell on 22nd Jan 2018

Easy fast and fun to use!!

Easy to use

Written by undefined on 6th Jun 2016

Brilliant product. Very quick-curing, easy to use. Can be cut with a craft knife after de-moulding (whilst still curing), and then sanded (or drilled) when cured, so any imperfections easy to rectify. Picks up detail beautifully. Pretty much fool-proof. First lot has lasted for ages, but I used the 30% sale offer to stock up on a couple more as I know I'll continue to use it! Good service, speedy delivery.


Written by encief design on 25th May 2016

Very impressed by this resin very quick to cure and easy to work no nasty smells couple that with excellent customer service and delivery means I will buy from Metal Clay again.

Easy to use

Written by undefined on 4th Nov 2015

Very easy to use, no smell, no mess, and sets before your eyes. Really pleased with this purchase!


Written by AndyM on 21st Apr 2015

Can't knock this stuff. Excellent for so many things

loving it

Written by undefined on 26th Feb 2015

After messing with different types of clay I tried this resin and I am hooked. The resin has virtually no odour, is easy to mix and the amount of casts per bottle is unbelievable. I do recommend reading the instructions and warming the moulds as instructed it makes a huge difference to how much detail is caught. Brilliant product.

Great product, does exactly what it says!

Written by Chris B on 27th Dec 2012

I bought this to mould some small plastic relay arms. The part was only 10mm x 15mm and 2mm thick in places. I was worried that the material would not be hard enough or would not flow into the small crevices but it worked really well. The part had fine details and is very strong. You can demould very quickly too, great product that works well! Fast delivery at good rate, many thanks, I will buy from you guys again soon!

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