How To Use Two Part Moulding Compound

Moulding compound is a room temperature vulcanising silicone which produces tough, strong, long lasting moulds ideal for using with precious metal clay (PMC). It is safe, non-hazardous and non-toxic and gives off no unpleasant fumes or odours. 

On this page we give instructions, tips and advice when using the compound to create moulds for metal clay jewellery designs, with examples from a project we created ourselves. 

Notes Before You Start...

The compound will leave an oily residue on your hands whilst working but do not worry – this is ordinary mineral oil, also commonly known as ‘baby oil ’.

WORKING TIME = 2 MINUTES

CURING TIME = 15 MINUTES

Choose the item you wish to make a mould from and make sure you have it to hand – timing is crucial so you do not want to waste any of the 2 minute working time.

How To Use...

Step One: Take equal parts of both green and white putty (try to be as accurate as you can but these need not be measured precisely) and shape them into thin ‘pancakes’ on a tabletop or work surface.

Step Two: Place one ‘pancake’ on top of the other and then mix them rapidly by pushing down with your thumbs, kneading with both hands or rolling between the palms (we found that a combination of these techniques works best). Do this for around 1 to 1 and a half minutes - be careful not to over mix! As over mixing can result in non-curing of the mould, the total moulding process must be complete within the 2 minute working time. Try to mix quickly and remember a uniform colour is not necessary.

Step Three: When you have finished mixing firmly press the item you would live to create a mould from into the compound.


Step Four: Leave the mould for at least 15 minutes. Check it has cured by pushing a fingernail or similar into the mould – if the compound has cured properly it should spring back into shape.

Step Five: Carefully remove your object. Your mould is now ready to use and fill with metal clay.

To view our moulding compound click here.

If you have any further questions, feel free to call our friendly team who will be more than happy to give you some advice through Facebook, Twitter, Email or simply calling us on 01872 573888 9am-4pm UTC.

Alternatively, for more information and how to's on all areas of jewellery making visit our other Gemstone Setting Advice pages.