HL-150 Properties and Functional Applications

A video to introduce HIFULL® fumed silica, today we are looking at HIFULL HL-150.

HIFULL HL-150 is a hydrophilic fumed silica with a specific surface area of around 150 square meters/gram. It has low specific surface, easy to disperse. HIFULL HL-150 plays a significant role in thickening, thixotropy, and elastomer reinforcement, especially in room-temperature vulcanization (RTV) silicone rubber and high-temperature vulcanization (HTV) silicone rubber.

PropertiesUnitTypical ValueTesting Standard
Specific surface area(BET)m2/g150±15GB/T 20020
pH in 4% dispersion 3.9~4.5GB/T 20020
Loss on drying(2 hours at 105℃)%≤1.5GB/T 20020
Loss on ignition(2 hours at 1000° based on material dried for 2 hours at 105℃)%≤2.0GB/T 20020
Sieve residue(45μm)mg/kg≤250GB/T 20020
Silica content( Based on ignited material)%≥99.8GB/T 20020
Tamped density(Based on material dried for 2 hours at 105℃)g/L40~60GB/T 20020

The silicone polymer network of RTV & HTV rubber is mechanically weak, It needs to be reinforced to be put into actual use. Adding HL-150 will increase the viscosity of the rubber material, improve the mechanical properties of vulcanized silicone rubber, such as hardness, tensile strength, tear resistance and abrasion resistance, as well as enhance the aging resistance and durability of the product, thus prolonging the service life.

In adhesives and sealants, HIFULL HL-150 improves the rheological and mechanical properties, strengthen the bonding strength, which can solve the problems of sagging and dripping during the application of polyurea sealants or tile grout.

SystemFunctionRecommend DosageHydrophobic Fumed Silica SuggestHydrophilic Fumed Silica Suggest
Epoxy Adhesivesag-resistance, settling-resistance1.5%-3.0%0.25%-2.0%HB-139
Polyurethane Adhesivesag-resistance, rheology control, thixotropic, viscosity increase1%-5%HB-139
Acrylic, cyan acrylic, Anaerobic acrylic, UV-cured acrylic adhesivessettling-resistance, rheology control, thixotropic 1%-5%HB-139
Organic silicone adhesivesreinforce, rheology control5%-15%HB-132
MS/SMP/SPU adhesivessag-resistance, rheology control, thixotropic, viscidity increase 1%-5%HB-151
Rubber-based adhesives (BR /CR /NR)rheology control, thixotropic, reinforce1%-5%4%-8%HB-151HL-200
Pressure sensitive adhesivesviscidity increaserheology control, thixotropic1%-5%4%-8%/HL-200

HL-150 performs excellent thickening and thixotropic, anti-sagging, anti-settling and reinforcing properties in coatings and paints, leather finishes, electrical insulators and liquid adhesives.

As a hydrophilic fumed silica, HL-150 has excellent reinforcing properties and is widely used in RTV rubber and HTV rubber. It is one of the representatives of HIFULL® hydrophilic fumed silica with a low specific surface area.

Silicone Rubber

Why add fumed silica to silicone Rubber HIFULL fumed silica in silicone rubber improves mechanical strength. Silicone rubber is aging-resistant, high and low temperature resistant and electricity-insulated. However, the molecular chain…
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Related Products

Hubei Huifu Nanomaterial Co., Ltd. manufactures more than 10 grades of fumed silica, both hydrophilic and hydrophobic. We get ISO, REACH, and participate in setting ISO18473-3-2018, ISO18473-1-2015, and ISO23157. We are strong in R&D product quality and factory capacity. Feel free to contact us by email: tww@hifull.com


Our main products are fumed silica SiO2, fumed titanium dioxide TiO2, and fumed alumina Al2O3. We get 20+ years of expertise and 20,000 tons of annual capacity. We supply total of 23 grades of hydrophilic & hydrophobic fumed silica. We get registration of REACH and pre-registration of K-REACH & KKDIK. We are the leading setting body of ISO18473-1:2015ISO18473-3:2018, and ISO 23157:2021. Learn More About Hifull

Frequently Asked Question

A Manufacturer. Hubei Huifu has been researching and manufacturing fumed silica for 20+ years. We are the largest manufacturer of fumed silica with a well-developed and stable manufacturing process in China.
We get registration of REACH and pre-registration of K-REACH & KKDIK. We get certificates of ISO 9001, ISO 14001. We are the leading setting body of ISO18473-1:2015, ISO18473-3:2018 and ISO 23157:2021.

  • Manufacturer: Leading fumed silica manufacturer in China with 20+ years of expertise, 12,000 tons annual capacity 
  • Registration & Certificate: REACH, K-REACH, KKDIK, ISO9001, HALAL, KOSHER
  • Manufacturer Direct Supply: 23 grades of hydrophilic; hydrophobic fumed silica supplied, good quality, competitive price
  • International Standard: Leading setting body of ISO18473-3-2018 Fumed silica for silicone rubber application; Member of the setting body of ISO18473-1-2015 Nanoscale calcium carbonate for sealant application
  • Technology Expertise: 50+ technology patents experienced R&D team from top universities of China Project 211 & Project 985 

Free Sample: All grades of fumed silica sample available, Contact to Us

Pyrohydrolysi & Trichloromethylsilane

Fumed silica is synthesized by the pyrohydrolysis of silicon tetrachloride or trichloromethylsilane in the flame of hydrogen and oxygen. Our main raw material is silicon tetrachloride, and the secondary is trichloromethylsilane.

Hydrophilic Fumed Silica SiO2:

HL-150 / HL-200 / HL-300 / HL-380 / HL-150W / HL-200W

Hydrophobic Fumed Silica SiO2:

DDS Treated — HB-151/ HB-152 ;
PDMS Treated — HB-139 ;
HMDS Treated — HB-132 / HB-135 / HB-612/ HB-615 / HB-620 / HB-630.

Fumed Titanium Dioxide TiO2: NT-50

Fumed Aluminium Oxide Al2O3: Aluna-80 & Aluna-100

Price is based on the actual grade.

When the price of raw material fluctuates, we may adjust the price accordingly, please enquire before placing orders. Our email: hifull@hifull.com. Cell : + 8618571019514

When fumed silica is used as filler or additives, it helps in thickening, reinforcement, transparency, free-flow, thixotropic performance, dielectric properties, anti-settling, heat insulation, and anti-sagging. For example, for powder products, HIFULL fumed silica is used as an anti-caking agent; for liquid products, HIFULL fumed silica is used as an anti-settling agent or suspending agent.

ApplicationsFunctionsRecommended Dosage
Paints & Coatingsrheology & thixotropic control,anti-sagging,anti-settling0.5-2%
UPR, Gel Coatrheology & thixotropic control,,anti-sagging,anti-settling0.5-2%
HTV Silicone Rubberreinforcement15-30%
RTV Silicone Rubberthickening & reinforcing10-20%
Adhesivesrheology & thixotropic control, anti-sagging,anti-settling2-10%
Cable Gelthickening5-10%
Gel Batterythickening0.5-6%
Industrial Powdersanti-caking0.5-1%

Quality Stabilization: we are the earliest fumed silica manufacturers with independent R&D in China, which guarantees our product stabilization.

Largest Manufacturer: Our annual output of fumed silica is about 12,000 tons.

Strong R&D Team: Besides our own R&D institute and application& technology department, we’ve to build a research center with Sichuan University and Wuhan University, both are top-tier universities in China.

Leading Authority: We have already been the influential enterprise in the silicon industry in China. Doctor Wang Yuelin, the actual controller of Hifull, is the leader of the Sino-Germany project ISO18473-3 << Fumed Silica for Silicon Rubber>> and he is granted the Outstanding Contribution Award by the committee.

Mainly T/T, L/C and D/P, actual payment terms please check with sales when placing orders.

We will arrange delivery immediately according to the manufacturing schedule and conditions. Due to shipping schedule or other factors, please check with sales when placing orders.

Still have questions?

If you cannot find an answer to your question in our FAQ, you can always contact us and we will be with you shortly.

Contact Support

Hello, Customers

My name is Van, I’m the business manager of HIFULL, I have been in Fumed Silica Industry for more than 10 years. Feel free to contact me. I’m happy to provide you the best service and products.
Business Manager