Xiamen Sinolook Oil Co., Ltd

Brake Fluid Manufacturer — DOT 3, DOT 4, DOT 5.1, HZY6 and Class 7

★ Brake Fluid Manufacturer Since 2000
One manufacturer. Every brake fluid grade you need.

DOT 3, DOT 4, DOT 4+, DOT 4 LV, DOT 5.1, HZY6 and patented Class 7 — manufactured at our Fujian plant since 2000. Certified to FMVSS 116, ISO 4925:2020, SAE J1703 and GB 12981. Trusted by lubricant brands, vehicle OEMs and aftermarket distributors across 60+ countries.

2000
Manufacturing Since
7
Product Grades
4
Quality Standards Met
60+
Countries Served
About Sinolook Brake Fluids

A complete brake fluid portfolio, manufactured in-house

Brake fluid is the hydraulic medium that turns pedal force into stopping power. The right grade determines boiling point, low-temperature viscosity and ABS / ESP responsiveness — directly impacting vehicle safety.

Sinolook manufactures the full glycol-ether brake fluid range — from entry-grade DOT 3 to patented Class 7 — at our IATF 16949 certified plant in Nan'an, Fujian. Every batch is verified by ABIC Testing Laboratories (USA) and ships with FMVSS 116, ISO 4925 and SAE J1703 certification.

A complete brake fluid portfolio from Sinolook — DOT 3 through Class 7
★ Certified to Every Major Standard

Tested at ABIC Laboratories USA. Certified to FMVSS, ISO, SAE and GB.

Every Sinolook brake fluid is independently tested at ABIC Testing Laboratories, Inc. in Fairfield, New Jersey, and certified to the four major international brake fluid standards. AMECA notification numbers are published for DOT 3 (#230611) and DOT 4 (#221045).

STANDARD 01
FMVSS 116
US Federal Motor Vehicle Safety Standard. AMECA registered.
STANDARD 02
ISO 4925:2020
International specification. Classes 3, 4, 5-1, 6, 7.
STANDARD 03
SAE J1703
Society of Automotive Engineers reference standard.
STANDARD 04
GB 12981 · IATF 16949
China national standard + automotive quality system.
Sinolook brake fluid manufacturing and quality control facility
Our Brake Fluid Range

Seven brake fluid grades, one manufacturer

From entry-grade DOT 3 to patented Class 7 — covering passenger cars, motorcycles, commercial fleets, electric vehicles and motorsport. All grades are glycol-ether based; DOT 5 silicone is available on consultation.

Sinolook HZY6 / ISO 4925 Class 6 brake fluid
ISO 4925 Class 6 · GB HZY6

HZY6 / Class 6

Premium grade for electric vehicles, hybrids and modern brake-by-wire systems. Low-viscosity formulation ensures fast pedal response in regenerative braking applications.

Dry ERBP260 °C
Wet ERBP170 °C
−40°C Visc.700 mm²/s
StandardFMVSS 116
View HZY6 details
Sinolook DOT 5.1 brake fluid — glycol-based high-performance
ISO 4925 Class 5-1

DOT 5.1

Glycol-ether based (not silicone). Highest boiling points among standard grades. For performance vehicles, sportbikes and demanding commercial applications.

Dry ERBP270 °C
Wet ERBP190 °C
−40°C Visc.800 mm²/s
StandardFMVSS 116
View DOT 5.1 details
Sinolook DOT 4+ PLUS / DOT 4 LV — low-viscosity brake fluid
ISO 4925 Class 4 · LV

DOT 4+ PLUS (DOT 4 LV)

Low-viscosity DOT 4 engineered for ABS, ESP and EHB systems. 1000 mm²/s at −40°C ensures fast valve response in cold-climate stability control.

Dry ERBP265 °C
Wet ERBP170 °C
−40°C Visc.1000 mm²/s
StandardFMVSS 116
View DOT 4 LV details
Sinolook DOT 4+ brake fluid — higher boiling point DOT 4
ISO 4925 Class 4 · Plus

DOT 4+

Upgraded DOT 4 with higher dry and wet boiling points. Suited for modern ABS / ESP vehicles operating under heavy braking loads or in warm climates.

Dry ERBP260 °C
Wet ERBP165 °C
−40°C Visc.1200 mm²/s
StandardFMVSS 116
View DOT 4+ details
Sinolook DOT 4 brake fluid — FMVSS 116 and ISO 4925 Class 4
ISO 4925 Class 4 · GB HZY4

DOT 4

The universal choice for modern passenger cars and light trucks. Higher boiling points than DOT 3 with full glycol-ether compatibility.

Dry ERBP250 °C
Wet ERBP160 °C
−40°C Visc.1300 mm²/s
AMECA #221045
View DOT 4 details
Sinolook DOT 3 brake fluid — FMVSS 116 and ISO 4925 Class 3
ISO 4925 Class 3 · GB HZY3

DOT 3

Entry-grade synthetic brake fluid for older vehicles, commuter motorcycles and hydraulic clutch systems. The most widely used grade globally.

Dry ERBP215 °C
Wet ERBP155 °C
−40°C Visc.1400 mm²/s
AMECA #230611
View DOT 3 details
At a Glance

All seven grades compared

Side-by-side specifications across the Sinolook brake fluid portfolio. Typical batch values shown; minimum requirements per the cited standards apply.

Grade Standard Dry ERBP (°C) Wet ERBP (°C) Visc. @ −40°C Best for
DOT 3 FMVSS 116 · ISO 4925 Class 3 215 155 1,400 mm²/s Older vehicles, clutch systems
DOT 4 FMVSS 116 · ISO 4925 Class 4 250 160 1,300 mm²/s Most cars and light trucks
DOT 4+ FMVSS 116 · ISO 4925 Class 4 260 165 1,200 mm²/s Modern ABS / ESP vehicles
DOT 4 LV FMVSS 116 · ISO 4925 Class 4 265 170 1,000 mm²/s ABS, ESP, EHB systems
DOT 5.1 ISO 4925 Class 5-1 270 190 800 mm²/s Performance vehicles, sportbikes
HZY6 ISO 4925 Class 6 · GB HZY6 260 170 700 mm²/s EVs, hybrids, regen braking

Values indicative. Refer to individual product TDS for batch-specific specifications. Independent ABIC test reports available on request.

Choose the Right Grade

Which brake fluid does your application need?

A quick selector based on the most common application profiles. When in doubt, the owner's manual or OEM specification always overrides — never use a grade lower than the manufacturer's requirement.

  • CASE 01 Older vehicles, commuter motorcycles, or the manual specifies DOT 3 DOT 3 →
  • CASE 02 Most modern cars and light trucks — the universal default DOT 4 →
  • CASE 03 Modern cars with ABS, ESP or stability control in cold climates DOT 4 LV →
  • CASE 04 Performance vehicles, sportbikes, demanding commercial fleets DOT 5.1 →
  • CASE 05 Electric vehicles, hybrids, brake-by-wire systems HZY6 →
  • CASE 06 Track-day, motorsport, extreme thermal cycling Class 7 →
Industries Served

Where Sinolook brake fluid ends up

From passenger car aftermarket to motorsport, EV OEM programs to heavy-duty fleet maintenance — the same manufacturing line serves them all.

Brake fluid for passenger cars and light trucks
Passenger cars & light trucks
DOT 3 · DOT 4 · DOT 4+
Brake fluid for heavy-duty commercial vehicles and bus fleets
Heavy-duty & bus
DOT 4 · DOT 4+ · DOT 5.1
Low-viscosity brake fluid for electric vehicles and hybrids
EVs & hybrids
DOT 4 LV · HZY6 · Class 7
Motorcycle brake fluid — DOT 4 and DOT 5.1
Motorcycles
DOT 4 · DOT 5.1
High-performance racing brake fluid for motorsport
Racing & track day
Class 7 · DOT 5.1
Brake fluid for off-highway construction, mining and agricultural machinery
Off-highway & machinery
DOT 4 · DOT 4+
B2B Capability

Built for global supply — from drum to ISO tank

Sinolook serves distributors, OEMs, fleet operators and private-label brands with flexible packaging, full documentation and reliable lead times.

SERVICE 01

OEM & private label

Custom labels, custom bottle and drum colors, dedicated SKU codes. Lead time 25–35 days from artwork approval.

SERVICE 02

Packaging options

250 ml / 500 ml / 1 L retail bottles · 5 L, 20 L, 200 L drums · 1,000 L IBC totes · Bulk in flexitank or ISO tank.

SERVICE 03

Global logistics

Direct shipment from Xiamen, Hong Kong or Singapore. FOB / CIF / DDP terms. UN 1992 / IMDG-compliant export packing.

SERVICE 04

Full documentation

TDS, SDS, COA, AMECA notification, country-of-origin and CIQ documents issued for every shipment.

FAQ

Frequently asked questions

Which brake fluid does my car need?
Check the reservoir cap or owner's manual — it is marked with a DOT grade (most commonly DOT 3, DOT 4 or DOT 4 LV). Never use a lower grade than specified. You can always upgrade within the same chemistry family — DOT 3, DOT 4 and DOT 5.1 are all glycol-ether based and compatible. DOT 5 silicone is not interchangeable with any other grade.
Is Sinolook a brake fluid manufacturer or trader?
Sinolook is the manufacturer. Production runs through our affiliated plant in Nan'an, Fujian, China, certified to IATF 16949:2016, ISO 9001:2015, ISO 14001:2015 and US DOT FMVSS 116. We have been manufacturing brake fluid since 2000.
What is the minimum order quantity (MOQ)?
Standard MOQ is 1 × 20'FCL (approximately 18–20 tons depending on packaging). Smaller trial orders may be accepted for OEM and private-label customers. Bulk shipment in flexitank or ISO tank is available for orders 20 tons and above.
What certifications do Sinolook brake fluids hold?
All Sinolook brake fluids are certified to the major international standards:
FMVSS 116 — AMECA registered (DOT 3 #230611, DOT 4 #221045)
ISO 4925:2020 — Classes 3, 4, 5-1, 6, 7
SAE J1703
GB 12981 — China national standard
Manufacturing operates under IATF 16949:2016 and ISO 9001:2015 quality systems. Independent test reports are issued by ABIC Testing Laboratories, Inc. (USA).
Can I order OEM or private-label brake fluid?
Yes. Sinolook offers full OEM and private-label service: custom label design, custom bottle and drum colors, custom packaging sizes from 250 ml to 200 L, and bulk supply. Lead time is typically 25–35 days from artwork approval.
Are DOT 5 and DOT 5.1 the same?
No. Despite the similar names, DOT 5 is silicone-based (PDMS) while DOT 5.1 is glycol-ether based — they are chemically incompatible and must never be mixed. Sinolook manufactures DOT 5.1 (glycol). For DOT 5 silicone applications, primarily older Harley-Davidson motorcycles and certain military vehicles, please consult our sales team.
What is the shelf life of unopened brake fluid?
Sealed brake fluid has a typical shelf life of 24 months from the production date when stored in original containers, away from direct sunlight, at 5–30 °C. Once opened, brake fluid begins absorbing atmospheric moisture and should be used within 12 months or discarded.
How can I request a quote or technical datasheet (TDS)?
Email sales@sinolook.com with the grade(s), quantity and delivery port; or use the contact form. WhatsApp +86 181 5036 2095 for fast response. Typical reply time is within 24 hours on business days.

Ready to source brake fluid from a 25-year manufacturer?

Tell us your grade, packaging requirement and destination — we'll respond within 24 hours with technical specs, pricing and logistics options.

Request a Quote
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