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SiSiB® PC9401

Tetramethyldivinyldisiloxane .
Synonym: Divinyltetramethyldisiloxane

Countertype of Degussa CD 6210

Chemical Structure


SiSiB® PC9401 is a high purity 1,3-Divinyl Tetramethyl Disiloxane, it is a colorless to yellowish clear liquid.

Typical Physical Properties

Chemical Name: Tetramethyldivinyldisiloxane
CAS No.: 2627-95-4
EINECS No.: 220-099-6
Empirical Formula: C8H18OSi2
Molecular Weight: 186.40
Boiling Point: 139°C [760mmHg]
Flash Point: 19°C
Color and Appearance: Colorless or yellowish transparent liquid
Density [25°C]: 0.811
Refractive Index [25°C]: 1.412[25°C]

Min.99.9% (Grade A)

Min.99.5% (Grade B)

Min.99.0% (Grade C)


SiSiB® PC9401 is used as a linear inhibitor in the formulating of two-part Silicone RTV-2 Addition Curing systems.

Because of the large vinyl content, small amounts are very effective in retarding and controlling the working time or pot life of two-part Addition-Curing Silicone RTVs.

Also, due to its boiling point of 139ºC, it is easily volatilized during curing. A suggested starting formulation is to use 0.25 to 0.50 parts by weight of SiSiB® PC9401 with 100 parts of the Base polymer containing the platinum catalyst.


Net weight 160Kg steel drum, for more details, please visit Packing Centre.

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