Smooth-On Oomoo 25 - Molding Silicone

OOMOO® 25 is an easy to use silicone rubber compound that features a convenient one-to-one by volume mix ratio (no scale necessary). It has low viscosity for easy mixing and pouring. Vacuum degassing is not necessary. This product cures at room temperature with negligible shrinkage. OOMOO® 25 has a 15 minute pot life, with a 75 minute cure time.

OOMOO™ 25 is suitable for a variety of art-related and industrial applications including making one and two-piece block molds for sculpture and prototype reproduction, casting plaster, resins and wax. OOMOO™ silicones are also suitable for electrical potting and encapsulation applications.


  • Convenient one-to-one by volume mix ratio (no scale necessary)
  • Low viscosity for easy mixing and pouring . . . vacuum degassing is not necessary

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