All the silicone rubbers sold in this listing are in Shore 20A hardness (soft, quite flexible), in various volumes and colours. Please refer to the drop down to select the size / colour you require. Working and cure times are unknown as we are clearing them in bulk.
These silicone rubbers are fresh and of high quality. They are not defective nor old.
Hardness: Shore 20A
Please take note that all silicone rubbers may be subject to cure inhibition by contaminants on the surface of the master, or the material of the master being used for mould making. If your silicone rubber does not cure, there could be a chance that your master is reacting with the silicone rubber.
Materials that may inhibit the curing of platinum silicones are: Sulphur-based clay, tin-cured silicone rubber, latex rubber, some paint products, some 3D-printed plastic materials, etc.
Uncured rubber can be difficult to remove from your masters and may stain them. We recommend performing a small test on your master before making your actual mould.
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