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Base Polymer - Silicone Rubber - Silanol Silicone Polymer - Hydroxy Silicone Fluid

SiSiB® PF1070 OH Polymer

α,ω-silanol-terminated polydimethylsiloxane;

Chemical Structure


SiSiB® PF1070 polymer are intermediates for most room temperature vulcanizeable (RTV) silicones.

Typical Physical Properties

Product: α,ω-silanol-terminated polydimethylsiloxane
CAS No.: 70131-67-8
Color and Appearance: Colorless transparent liquid
Specific Gravity [25°C]: 0.96-0.98
Refractive Index 25°C 1.401-1.403

Product: Available Viscosity
SiSiB® PF1070-750 750cps
SiSiB® PF1070-1500 1500cps
SiSiB® PF1070-2000 2000cps
SiSiB® PF1070-3500 3500cps
SiSiB® PF1070-4000 4000cps
SiSiB® PF1070-5000 5000cps
SiSiB® PF1070-6000 6000cps
SiSiB® PF1070-10000 10000cps
SiSiB® PF1070-20000 20000cps
SiSiB® PF1070-50000 50000cps
SiSiB® PF1070-80000 80000cps
SiSiB® PF1070-150000 150000cps


Condensation cure one-part and two-part RTV systems are formulated from silanol terminated polymers with molecular weights ranging from 15,000 to 150,000. One-part systems are the most widely used. One-part systems are crosslinked with moisture-sensitive multi-functional silanes in a two stage reaction. In the first stage, aftercompounding with fillers, the silanol is reacted with an excess of multi-functional silane. The silanol is in essence displaced by the silane.

The reactivity of silanol fluids is utilized in applications other than RTV's. Low viscosity silanol fluids are employed as filler treatments and structure control additives in silicone rubber compounding. Intermediate viscosity, 1000-10,000 cSt. fluids can be applied to textiles as durable fabric softeners. High viscosity silanol terminated fluids form the matrix component in tackifiers and pressure sensitive adhesives.

GUIDE - SiSiB SILANES & SILICONES - RTV-1 formulation solution

GUIDE - SiSiB SILANES & SILICONES - RTV-2 formulation solution


Net weight 190Kg steel drum or 950Kg IBC container, for more details, please visit Packing Centre.

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