Our moulds are made out of professional silicone for reproductions of shore 22 thoughness.
Moulds may contain irrelevant positive or negative bubbles from 0,1mm to 1mm in its surface. They are not suitable for vacuum reproductions.
Some molds contain pieces on the side, consider them extra, they are not essential and due to the area where they are, they may contain small bubbles.
Poliurethane resin reproductions may slightly dye the mould of a yellowish shade but that wonÕt affect the detail of the pieces in any way.
We strongly recommend to store the silicone moulds in a flat surface with no weight over them, if possible with pieces inside to avoid deformations.