FM-0815J | Reactive PDMS - Monoterminal Alkoxysilyl

Harmonization Code : 3910.00.00.60 |  
Main features
  • Mono terminal
  • 3,000 g/mol | 26 mPas
  • Alkoxysilyl functional group

Product Description

Silaplane FM-0815J is a trimethoxy silyl terminated PDMS designed to increase filler loadings improving performance proerties in silicone systems. Moreover, it is also used as a PFAS-free alternative showing equal to improved performance compared to F-containing systems.

Among the other Silaplane products, FM-0815J has siloxane chains and alkoxysilyl groups that has the ability to chemically bond to the surface of the inorganic filler thus stabilizing the filler dispersion. It is also effective in reducing viscosity of filer dispersions better than silane coupling agents.

Functions excellently alongside silicone oil. Suitable for use with epoxies and polyurethane.

Product Family

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.

Technical Specifications

General Properties
Molecular weight 3000 g/mol
Specific Gravity
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
Physical Properties
Viscosity is a measurement of a fluid’s resistance to flow.

Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.

A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.

The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
20-30 mPa.s

Additional Information

SilaplaneTM FM-0815J is a dispersant with stronger filler adsorption.


  • Lowers the viscosity of dispersion maintaining the thermal conductivity with the same filler filling ratio.
  • Increases the heat dissipation performance (thermal conductivity) by further increasing the filler filling ratio.
  • SilaplaneTM is effective in reducing the viscosity of alumina-filled dispersions and sufficiently lowers viscosity even at low addition concentrations.


Unique adsorption properties of FM-0815J:

Silaplane TM (FM-04 series, FM-DA series)
The hydroxy groups of SilaplaneTM physically adsorb to the filler by hydrophilic interaction with the hydroxy groups on the filler surface.


(New) FM-0815J
The alkoxysilyl groups of FM-0815J chemically bond to the hydroxy groups on the filler surface, resulting in strong chemisorption to the filler.

PFAS Information

Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals that contain fluorine atoms. They are known for their unique properties, including their resistance to heat, water, and oil. PFAS can be found in a wide range of products, including firefighting foams, non-stick cookware, water-repellent fabrics, and more.

"F-containing systems" is a broader term that can refer to any system or material that contains fluorine (F) atoms. This can include PFAS but is not limited to them. F-containing systems can encompass a wide variety of compounds and materials that incorporate fluorine in their chemical structure.

In summary, PFAS is a specific category of chemicals that contain per- and polyfluoroalkyl substances, while "F-containing systems" is a more general term that includes any system or material that contains fluorine atoms, not limited to PFAS.


Solubility of FM-0815J

Solvent FM-0815J
Toluene Soluble
Acetone Soluble
THF Soluble
Butyl acetate Soluble
DMAC Not soluble
Ethanol Soluble
Methanol Not soluble
Water Not soluble