Silicone Rubber Polytek Platsil 73-15

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  • Silicone Rubber Polytek Platsil 73-15

Silicone Rubber Polytek Platsil 73-15

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  • Product Details:

    • PlatSil® 73-15 Silicone Rubber is a two-part, platinum-catalyzed, liquid silicone system that cures (RTV) to a white translucent, Shore A15 rubber.
    • The transparent nature of the cured rubber makes it a good option for molds that need to be cut after cured – because the model is visible, parting lines can be better determined.
    • It is also very useful when casting intricate parts to ensure that the entire mold cavity has been filled with casting material.
    • This is a pourable rubber, but it can be easily thickened with PlatThix Liquid Thickener or Fumed Silica for brush-on application.
    • For all instructions, and product information please see the TDS below.
    • **We often get asked how much is in a kit, and the answer is below.  But, to simplify, each 1lb of material is 25 cubic inches, which is just under the size of a 3" x 3" x 3" cube (picture a Rubik's Cube)



    Mix Ratio

    Shore Hardness

    Pour Time

    Cured Color

    Mixed Viscosity

    Specific Volume

    Demold Time

    Shrinkage Upon Cure



    20 min.

    White Translucent

    2,500 cP

    25.0 in³/lb

    4 – 5 hr.


    Contamination from sulfur (e.g., sulfur-based clay), amines, tin compounds, cured polyester resin, some paints and some silicone rubbers may inhibit surface cure of platinum-cured rubbers. For additional physical property specifications, refer to the Physical Properties Bulletin.