This item is 1Kg of Jesmonite branded Portland Stone filler powder. This filler powder is specifically designed for use with the Jesmonite casting system, but can also be used with other cold casting systems.
Jesmonite Stone fillers should be added to mixed Jesmonite resin at up to 1:1 ratio by weight. If you have 1Kg of mixed resin then you can add up to 1Kg of filler powder.
