Polytek Poly 74-30 Trial Kit (4lb)

Article number: 06305
Availability: In stock (4)

Poly 74-30 is a 1A:1B mix, A30 hardness, liquid polyurethane rubber that can be demolded in ~16 hours. This liquid rubber is great for making molds for casting materials such as concrete, plaster, resins (polyurethane, polyester, epoxy – with proper release agents), and wax. This rubber is used extensively by art foundries and individual artists for making molds for sculptural reproduction in wax (for hot bronze) or for bonded bronze casting.

Mix Ratio  Shore Hardness      Pour Time        Cured Color           Mixed Viscosity          Specific Volume   Demold Time

1A:1B               A30                      25-30 min.           Amber/Varies          2,000 cP                 27.5 in³/lb              ~16 hr.

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