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OOMOO™ 25 Technical Specifications

No Scale or Vacuum Chamber Required

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All Technical Data

Product Type
  • Silicone Rubber - Tin Cure
Mixed Viscosity4,250 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight100A:130B
Pot Life15 minutes
Cure Time75 minutes
Shore A Hardness25
Specific Gravity1.34 g/cc
Specific Volume20.6 cu. in./lb.
ColorLight Blue
Die B Tear Strength40 pli
Tensile Strength240 psi
Elongation @ Break250 %
100% Modulus100 psi
Shrinkage0.0025 in. / in.
Useful Temperature (min)-65 °F
Useful Temperature (max)400 °F

Product Description


No Vacuuming – No Scale – Easy To Use . . . OOMOO™ 25 is an easy to use tin cure silicone rubber compound that features a convenient one-to-one by volume mix ratio (no scale necessary). It has a 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 and 75-minute cure time.

For The Novice Mold Maker - OOMOO™ silicones do not have great tear strength. They are good for making simple one or two-piece block molds. If you require a high tear strength silicone, Mold Max™ silicones are recommended.

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.

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