Fume Silica with Low Permeability

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Loading Port:
China Main Port
Payment Terms:
TT or LC
Min Order Qty:
10 Metric Tons m.t.
Supply Capability:
3600 Metric Tons per Month m.t./month

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Product Description:

1.Microsilica 85%-98%

2.High fluidity

3.Low permeability

4.Meets the requirements of ASTM C-1240 



*Microsilica , also called silica fume or micro silica, is a byproduct of producing silicon metal or ferrosilicon alloys. 

*Silicon metal and alloys are produced in electric furnaces. The raw materials are quartz, coal, and woodchips. 

*The smoke that results from furnace operation is collected and sold as silica fume, rather than being land filled. 

*Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2), its average granule diameter is 0.15~0.20 µm,specific surface area is 15000~20000 m2/kg, and it has extremely strong surface active.

*Microsilica can be used in a variety of cementation products, such as concrete, grouts, and mortars as well as elastomeric, polymer, refractory, ceramic and rubber applications.

*HS No.: 28112200 China Origin, microsilica meets the requirements of ASTM C-1240.

*Microsilica CAS #: 69012-64-2


Main function

*Very low permeability to chloride and water intrusion.

*Extremely high electrical resistivity (20 to 100 times greater than ordinary concrete).

*Increased abrasion resistance on decks, floors, highways and marine structures.

*Superior resistance to chemical attack from chlorides, acids, nitrates and sulfates.


Specification of Microsilica

Index items

Standard Value

SiO2(Silicon Dioxide)

Min. 97.0%


Max. 0.7%

Fe2O3 (Iron Oxide)

Max. 0.1%

Al2O3(Aluminium Oxide)

Max. 0.3%

CaO(Calcium Dioxide)

Max. 0.3%

MgO(Magnesium Dioxide)

Max. 0.2%

K2O(Potassium Dioxide)

Max. 0.3%

Na2O(Sodium Dioxide)

Max. 0.2%

P2O5(Phosphorus Pentoxide)

Max. 0.1%

SO3(Sulphur Trioxide)

Max. 0.2%

Cl (Chloride)

Max. 0.1%

Moisture Content(H2O )

Max. 0.5%

Loss on Ignition(L.O.I)

Max. 0.5%

Percent Retained On 45μm (325 sieve)

Max. 0.5%

Bulk Density

250-300kg/m3 and 450-600kg/ m3


Micro-Silica Fume company 


We are willing to take a sincere attitude and cooperation with you.


(1) Quality 

We have our own test lab in factory and supply stable and reliable microsilica to our customers.


(2) Price


(3) Convenient

Delivery is fast and easy.


(4) Service

Our sales groups are positive attitude, and 24 hours feedback service to ensure the service is good.


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Relying on many years of a good reputation and good service, we have many customers from at home and abroad. We have established long-term and steady business relationship with them. Our Microsilica products are not only selling well in China, but also exported to the United States, Germany, Australia, Asia, and other countries and regions around the world.

1. Manufacturer Overview

Location Luoyang, Henan, China (Mainland)
Year Established 2011
Annual Output Value US$2.5 Million - US$5 Million
Main Markets North America; South America; Eastern Europe; Southeast Asia; Oceania; Mid East; Eastern Asia
Company Certifications ISO 9001:2008

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Export Percentage 31% - 40%
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