BW6-959 Single-Component Modified Polyurea Heavy-Duty Anticorrosion Coating

Product description

BW6-959 single-component modified polyurea heavy-duty anticorrosion coating.

Built from single-component MDI resin prepolymer, BW6-959 forms a compact, tough and flexible film with urea, biuret, urethane and hydrogen-bond structures for long-lasting industrial corrosion protection.

What BW6-959 delivers for industrial buyers

The product is positioned for industrial heavy anticorrosion projects where buyers need substrate adhesion, corrosive-media resistance, flexible film behavior and practical field application.

Industrial heavy anticorrosion barrierThe dense cured film helps block air, moisture, salt, acid rain and other corrosive media from reaching metal substrates.
Single-component moisture-cure workflowOne-component construction avoids two-part mix-ratio control while still requiring clean pouring, sealing and 1-hour use after material is poured out.
Metal and concrete substrate fitThe data sheet lists firm bonding to carbon steel, concrete and other substrates, with specific preparation guidance for metal, concrete and wood.
Flexible film for cyclic stressThe compact yet tough film can tolerate minor deformation from vibration and thermal expansion without cracking under suitable conditions.
Chemical media resistanceReference testing covers acid, alkali, salt solution, salt spray, diesel and crude oil exposure for corrosion-protection review.
Multiple application methodsThe application guide lists airless spray, air spray, brush and roller instead of requiring a single spray-only setup.

Protection points that matter for industrial anticorrosion projects.

BW6-959 is positioned around heavy-duty corrosion blocking, practical single-component handling, prepared metal or concrete surfaces, and resistance to common industrial corrosive media.

2000 hSalt spray resistance. Listed result: no corrosion, no bubbles and no peeling after 2000 h salt spray exposure.

-40 to +200°CTemperature-change resistance. 24 h test result listed as no abnormality for thermal cycling review.

5AAdhesion to steel substrate. ASTM D-3359 result listed as 5A, the highest grade.

30 dAcid resistance. 50% H₂SO₄ or 15% HCl, with no corrosion, bubbles or peeling.

Application scope

Typical use areas for BW6-959.

Use BW6-959 for industrial anticorrosion and waterproof protection where prepared substrates face moisture, air, salt, oil, acid rain or similar corrosive media.

Industrial structures

Petroleum and chemical pipelinesFor anticorrosion protection on prepared pipeline and equipment surfaces in petroleum and chemical sites.
Storage tanks and metal renovationThe Chinese sheet lists tanks and metal structure surface renovation as important application directions.
Power plant, traffic and construction facilitiesSuitable for project review in power, transportation, construction and other industrial enterprise environments.

Substrate and media review

Carbon steel and prepared metalMetal surfaces should be blasted to Sa2.5 or polished to St3 where specified before coating.
Prepared concrete surfacesConcrete should be strong, compact, flat, clean and dry, with defects repaired before application.
Corrosive media exposureReference data covers acid, alkali, salt, salt spray, diesel and crude oil exposure for specification screening.

Product information & technical data

Technical data for BW6-959 industrial anticorrosion coating.

Review product information, physical properties and chemical resistance data from the BW6-959 technical sheet before project specification or purchasing.

Product information

Item	Result
Appearance	Color adjustable
Viscosity (cps) @ 20°C	250
Solid content (%)	≥65
Surface dry time (h)	2-4
Pot life (h)	1
Theoretical coverage	0.13 kg/m2 at 100 µm film thickness

Physical properties

Item	Test standard	Result
Pencil hardness	GB / T 6739-2006	2H
Bending test (cylindrical mandrel) mm	GB / T 6742-1986	1
Breakdown resistance strength (kV / mm)	HG / T 3330-1980	250
Impact resistance (kg.cm)	GB / T 1732	60
Resistance to temperature changes (-40 to +200°C), 24 h	GB / 9278-1988	No abnormality
Adhesion, steel substrate	ASTM D-3359	5A (highest grade)
Density (g/cm3)	GB / T 6750-2007	1.03

Chemical resistance

For reference: pay attention to evaporation, splash and spillage effects. Independent immersion testing is recommended when detailed project-specific data is required.

Exposure item	Result
Acid resistance 50% H₂SO₄ or 15% HCl, 30 d	No corrosion, no bubbles, no peeling
Alkali resistance 50% NaOH, 30 d	No corrosion, no bubbles, no peeling
Salt resistance 50 g/L, 30 d	No corrosion, no bubbles, no peeling
Salt spray resistance, 2000 h	No corrosion, no bubbles, no peeling
Oil resistance, 0# diesel and crude oil, 30 d	No bubbles, no peeling

Application guide

Application conditions, substrate preparation and coating methods.

Confirm temperature, humidity, dew point, substrate preparation, film thickness and recoat timing before applying BW6-959 by spray, brush or roller.

Application environment

Check site temperature, humidity and dew point before coating prepared metal or concrete surfaces.

Condition	Requirement
Environment temperature	-5 to +35°C
Relative humidity	35-85% RH
Dew point	Metal surface temperature must be at least 3°C above dew point

Substrate preparation

Prepare each substrate according to the technical sheet before full application.

Substrate	Preparation requirement
Metal surface	Sand blast to ISO 8501-1 or GB 8923 Sa2.5; electric-tool polish to St3 is also listed
Concrete surface	Strong, compact, flat, clean and dry; repair sanding, shelling, cracks, honeycombs and pitted defects as needed
Wood surface	Clean and dry, with no burrs, debris or loose fragments
Other substrates	Consult BW technical personnel before application

Application instructions

Use the coating method, recoat interval and handling notes below for project planning.

Guide item	Recommendation
Recommended dry film thickness	100-200 µm, or as design requirement
Recoating interval	2-24 h; if longer than 24 h or dust has deposited, sand, clean well and then recoat
Coating method	Airless spray, air spray, brush or roller
Low-temperature use	Can be applied below 10°C; keep the coating bucket in an air-conditioned room for more than 24 hours before low-temperature application
Material handling	Stir evenly, pour out only the required amount, seal immediately, and use poured material within 1 hour
Thinner control	Do not add thinner without supplier approval and guidance for the designated special thinner

Chemical resistance

For reference: pay attention to evaporation, splash and spillage effects. Independent immersion testing is recommended when detailed project-specific data is required.

Exposure item	Result
Acid resistance 50% H₂SO₄ or 15% HCl, 30 d	No corrosion, no bubbles, no peeling
Alkali resistance 50% NaOH, 30 d	No corrosion, no bubbles, no peeling
Salt resistance 50 g/L, 30 d	No corrosion, no bubbles, no peeling
Salt spray resistance, 2000 h	No corrosion, no bubbles, no peeling
Oil resistance, 0# diesel and crude oil, 30 d	No bubbles, no peeling

Curing time, shelf life and packing

Curing, storage and packing information for project planning.

Use the curing profile and package information below to plan application timing, storage and purchasing for BW6-959.

Product curing time

Note: curing time varies with environmental conditions, especially temperature and relative humidity.

Substrate temperature	Surface dry time	Foot traffic	Solid dry time
+10°C	6 h	24 h	7 d
+20°C	3 h	12 h	6 d
+30°C	2 h	8 h	5 d

Shelf life & packing

Item	Details
Package	5 kg/bucket, 20 kg/bucket, 25 kg/bucket
Shelf life	12 months unopened
Storage temperature	5-35°C
Storage precaution	Store in a cool, ventilated place; avoid direct sunshine and keep away from heat

Health & safety / integrity declaration

Safety data, handling guidance and application verification.

Product health and safety information

For safe handling, storage and disposal of chemical products, users should refer to the latest Material Safety Data Sheet containing physical, ecological, toxicological and other safety-related data.

Integrity declaration

All technical data in this sheet is based on laboratory testing. Actual results may vary with site conditions and test methods, so users should test and verify applicability before full application.

FAQ

FAQ about BW6-959 heavy-duty anticorrosion coating.

These answers follow the BW6-959 technical sheet and focus on industrial anticorrosion buyers, substrates, corrosive media and application methods.

What is BW6-959 used for?

BW6-959 is used for anticorrosion and waterproof protection in industrial enterprises including petroleum, chemical, transportation, construction and power plant projects, with the Chinese data sheet also listing petroleum and chemical pipelines, tanks and metal structure renovation.

Is BW6-959 a single-component coating?

Yes. The data sheet describes BW6-959 as a single-component modified polyurea heavy-duty anticorrosion coating made from one-component MDI resin prepolymer, so no two-part mixing ratio is required.

Which substrates are listed for BW6-959?

The product advantages list firm adhesion to carbon steel, concrete and other substrates. The application guide gives surface preparation guidance for metal, concrete and wood surfaces, with other substrates requiring BW technical review.

Does BW6-959 require spray equipment?

No single method is mandatory. The data sheet lists airless spray, air spray, brush and roller as coating methods, and also describes it as a hand-brushable coating that is easy to apply.

What corrosive media does the data sheet reference?

The sheet lists resistance to 50% sulfuric acid or 15% hydrochloric acid for 30 days, 50% sodium hydroxide for 30 days, 50 g/L salt solution for 30 days, 2000 h salt spray, diesel and crude oil exposure.

What surface preparation is recommended before application?

For metal surfaces, the Chinese sheet recommends sand blasting to ISO 8501-1 or GB 8923 Sa2.5. It also allows polishing to St3 with electric tools. Concrete should be strong, compact, flat, clean and dry, with defects repaired as needed.

Request technical documents

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Request TDS, application guidance or project support.

If you are evaluating BW6-959 for pipelines, tanks, metal structure renovation, prepared concrete, or industrial corrosive-media exposure, request the latest technical data sheet and project-specific compatibility review before ordering.