Crafist® Karopol Duplicator Mold Polyurethane-55 is a special polyurethane including A and B components used in the production of Duplicators. Karopol-55 components are mixed in one to one proportion 100: 100 and they are beige. To prevent unmixed materials from pouring into the mould on the rim of the container, the material is transferred to a second clean container and mixed again. (Under normal conditions, total mixing procedure don't exceed 3 minutes) Karopol -55 is a resistant material with a hardness of 55 Shore. Karopol -55 has a fluid-structure. Because of this it provides ease of casting and can easily release the air inside. Karopol -55 does not leak from the mould it is poured thanks to its fast pick up feature. Karopol -55 have a high tear strength and do not soak. Karopol -55 can be sanded with 200 grit diamond sanding pads. The reaction time of the product varies according to the amount of material used, mixing speed and ambient temperature. Excessive material amount, high-speed mixing and high ambient temperature cause the mixture to react faster thus fastens its curing. The mould which was casted can be opened after 24 hours. (It can be opened in 17-18 hours) We recommend you to wear protective glasses, long sleeves and rubber gloves to minimize the risk of getting dirty.