Nanjing SiSiB Silicones Co., Ltd.
Nanjing SiSiB Silicones Co., Ltd.
SiSiB® STP51280
SiSiB® STP51280

Silane Terminated Polyether

SiSiB® STP51280 is dimethoxysilane and triethoxysilane mixed-terminated polyether polymer. It could be applied in moisture curing elastic sealant, elastic structure sealant and sealing coatings. Sealants based on SiSiB® STP51280 not only have excellent adhesion properties, but also have adhesion to broad range of substrates. 

Different from polyurethane and silicone system, this formulation have no solvent and isocyanate, as well as no bubbles and odour generated from curing. It is especially suitable for silicone construction industry, transportation industry and general industry application.

SiSiB® STP51280

Technical Data


Silane Terminated Polyether Polymer


Polypropylene glycol

Reactive terminal groups:

Methyldimethoxysilyl and Triethoxysilyl

CAS No.:


Viscosity 25°C:


Density 25°C:


Boiling point


Melting point

< 0°C

Flash point:

> 237°C


Max. 1%

Water solubility/miscibility

Virtually insoluble


  • SiSiB® STP51280 silane terminated polyether is used as base polymer in elastic sealants, elastic structure sealants, encapsulate adhesives and coatings. The curing mode of the polymer is moisture curing; it can be made into a single component or two-component system.

  • Auto industry elastic sealant

  • High strength adhesive

Packing and Storage

  • SiSiB® STP51280 is supplied in 200Kg steel drum or 1000Kg IBC tote.

  • In the unopened original container SiSiB® STP51280 has a shelf life of one year in a dry and cool place.

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SiSiB® STP51280