Mould-it: Modelling Plasticene
We like to use it as a sealant round the edges of mould boxes - our liquid silicone is pretty runny stuff and will escape if it can - so adding a wall of this plasticene-like putty will act as a barrier. Sculpt a masterpiece from this modelling material and then make your own mould from it using our mould:it collection of liquid silicone.
Our image shows purple, but your plasticene may come purple, blue or stone colour... depending on what we have in stock.
Each "lump" is approx 100g and can be re-used over and over again.
Keep it away from water and preferably in a biodegradable ziplock bag.