This mould making auxiliary tool will be great help to you while making the mould from the model.
This serves as reusable edge building the outer shape of the mould.
Material: polypropylene, which practically does not adhere to anything.
so you can use for
making silicone mould for home
but e.g. polyurethane concrete blocks,
for wax forms, etc.
Should the sizes be not sufficient for your purposes then you can combine several packages to create the appropriate boundary elements.
1 x 115 mm x 195 mm plate (5 mm thick)
4 x 58 mm x 195 mm plates (5 mm thick)
1 x 10 ml silicone adhesive
The silicone adhesive provides a temporary bond with sufficient strength and insulation which is chemically neutral.
That all means, it does not inhibit the curing and polymerization of any casting resins.
After the boundary elements are dismantled, the silicone adhesive can be easily removed from the plates and are ready to serve again for another plaster, concrete, ceramic, silicone mould.