GP-426 Hydroxyl-Terminated Silicone Fluid

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GP-426 is a hydroxyl- terminated dimethyl polysiloxane with a nominal viscosity of 100 cSt at 25º C. The hydroxyl groups of GP-426 provide a reactive site, allowing it to become condensed with other hydroxyl groups or with Methyl Hydrogen Polysiloxanes in combination with heat or metal catalysts.

Typical Properties
Clear, Colorless Liquid
Weight/Gallon @ 25°C
8.1 lbs
Viscosity (cPs) @ 25°C
100 cP
Specific Gravity
Molecular Weight (Calculated)
3400 amu
Wt. % Silicone
Refractive Index


The following are some of the suggested applications for GP-426:

  • Room Temperature Curing Silicone Rubber Component
  • Hydrophobic Treatment of Powders and Pigments
  • Water Proofing Agent for Textiles, Paper and Leather
  • Rubber Lubrication

Processing and Safety Guidelines

GP-426 may cause skin irritation. Consult Safety Data Sheet for additional safety information.


GP-426 is supplied in 5-gallon (40 lb.) pails, 55-gallon (440 lbs.) drums and 330-gallon (2640 lbs.) totes.