Nanjing SiSiB Silicones Co., Ltd.
Nanjing SiSiB Silicones Co., Ltd.
SiSiB® PC3500
SiSiB® PC3500


SiSiB® PC3500 is a clear colorless, low-odor liquid. SiSiB® PC3500 may be used as an adhesion promoter (coupling agent) for organic/inorganic interfaces, as a surface modifier (e.g. regulating surface polarity) or as a crosslinking agent (moisture-curing of polymers). When used as coupling agent, it generally reduces the sensitivity of the products' mechanical and electrical properties to heat and/or moisture.

SiSiB® PC3500 silane oligomer is the equivalent of Momentive's A-186, Dow's Z-6043, ShinEtsu's KBM-303 silane.

SiSiB® PC3500

Technical Data







Molecular Weight


Boiling Point

310°C [760mmHg]

Flash Point


Color and Appearance

Colorless clear liquid

Density 25/25°C


Refractive Index


Min. Purity


Caution: SiSiB® PC3500 is soluble in water after hydrolysis, alcohol, acetone and most aliphatic esters at normal application levels under five percent. Hydrolysis releases methanol.


  • SiSiB® PC3500 has a more reactive epoxy group when compared to the more common SiSiB® PC3100. This enhanced reactivity is due to the added strain put on the epoxy group by the presence of the second ring; the cyclohexyl. The increased epoxy reactivity combined with the greater organic character from the cyclohexyl group often results in enhanced mechanical properties and better wet-strength retention of properties when compared to SiSiB® PC3100.

  • SiSiB® PC3500 epoxy silane can be used to improve dry and wet strength in cured composites reinforced with glass fiber rovings.

  • SiSiB® PC3500 can be used to enhance wet electrical properties of epoxy-based encapsulate and packaging materials.

  • SiSiB® PC3500 can be used to eliminate the need for a separate primer in polysulfide and urethane sealants.

  • SiSiB® PC3500 can be used to improve adhesion in waterborne acrylic sealants and in urethane and epoxy silicone coatings.

Packing and Storage

  • SiSiB® PC3500 is supplied in 200Kg steel drum or 1000Kg IBC container.

  • In the unopened original container SiSiB® PC3500 has a shelf life of one year in a dry and cool place.

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SiSiB® PC3500