BW PolyureaProtective CoatingsContact

BW3-951 Spray Polyurea Elastomer Anticorrosion Waterproof Protective Coating

BW3-951

100% solids aromatic spray polyurea elastomer for project-scale waterproofing, anti-corrosion protection and seamless coating systems on prepared concrete, steel and industrial substrates.

View Technical DataRequest TDS & Quote
Finished light-gray spray polyurea waterproofing membrane on an industrial roof

Product Description

BW3-951 is a 100% solids aromatic spray polyurea elastomer. It exhibits excellent insensitivity to ambient humidity and temperature during application, fully meeting the performance requirements of professional anti-corrosion and waterproofing projects. This product has been widely applied in industrial and commercial fields for the all-around anti-corrosion and waterproofing protection of various structures and substrates.

BW3-951 Part A and Part B product drums

Application Scope

BW3-951 is used for anticorrosion, waterproof and protective coating work in construction, chemical facilities, automobile manufacturing, metallurgy, electric power, marine, shipbuilding, film props, speakers and other fields.

  • ConstructionWaterproof and protective coating for prepared concrete, roof, basement and structural substrates.
  • Chemical FacilitiesAnticorrosion and waterproof protection where acids, alkali, salts, oils or chemical splash may be reviewed.
  • Automotive ManufacturingProtective coating review for prepared manufacturing-area structures, equipment bases and related substrates.
  • Metallurgy and Electric PowerIndustrial waterproofing, lining and protective coating for plants, trenches, equipment bases and containment areas.
  • Marine, Shipbuilding and Other UsesProtective coating for prepared marine, shipbuilding, film-prop, speaker and custom substrates after compatibility review.

Designed for Stable Spray Protection Across Changing Site Conditions

BW3-951 helps applicators form a continuous spray-applied membrane on properly prepared substrates while reducing sensitivity to humidity and temperature during application. It is a suitable choice when projects need fast film build, fewer weak joints and integrated anticorrosion waterproof protection.

100%Solids ContentBuilds a solvent-free protective film without solvent evaporation, helping reduce shrinkage and support consistent membrane thickness.
3-5 sGel TimeSupports rapid spray build on vertical, curved and detailed surfaces, helping the membrane stay in place during application.
20 MPaTensile StrengthProvides mechanical resistance for protective layers exposed to movement, abrasion or demanding service conditions.
460%ElongationHelps the film flex with substrate movement and maintain continuity around joints, corners and transitions.

Product Features and Advantages

BW3-951 is built for stable spray application under changing site conditions, helping applicators maintain film continuity, fast curing and reliable protective performance during project-scale waterproofing and anti-corrosion work.

Film Formation and Application

  • Solvent-Free 100% SolidsBuilds film without solvent evaporation, helping maintain thickness and reduce shrinkage during cure.
  • Rapid Cure Without SaggingSupports fast build on vertical, sloped and curved surfaces where a sprayed membrane needs to stay in place.
  • Humidity and Temperature ToleranceHelps the spray process remain more stable when site conditions are difficult to keep perfectly constant.
  • Dense Seamless FlexibilityForms a dense, seamless coating that can flex with prepared substrates and detail areas.
  • Fast Return to ServiceFast curing helps shorten the waiting time between spraying and the next project stage.
  • Durability SupportSupports long-term protective service when the substrate, primer, film thickness and exposure conditions are confirmed.

Protection Performance

  • High Adhesive StrengthSupports strong bonding to steel, concrete, wood, glass fiber and other compatible substrates after proper preparation.
  • Impact and Abrasion ResistanceHelps protect surfaces exposed to wear, impact, traffic or demanding industrial service conditions.
  • Chemical ResistanceSupports anticorrosion protection where acids, alkali, salts, oils or chemical splash need to be reviewed.
  • Waterproof PerformanceForms a continuous membrane for compatible structures that need waterproof and anti-seepage protection.
  • Shock and Temperature Variation ResistanceHelps the protective layer handle vibration, impact and temperature-change stress in service.

Technical Data

These technical values are measured under controlled laboratory conditions to support product comparison, project selection and specification review. Please confirm final requirements with the latest approved TDS and project-specific conditions.

Product Information

Product data table
ItemPart APart B
AppearancePale yellow liquidAdjustable color
Specific gravity (g/cm³)1.131.04
Viscosity (cps) @ 25°C720570
Solid content (%)100100
Mix ratio (by volume)11
Gel time (s) @ 25°C3-5
Theoretical coverage (DFT)1.08 kg/m² film thickness: 1 mm

Physical Properties

Product data table
ItemTest standardResult
Hardness (Shore A)GB/T 23446-200990
Elongation rate (%)GB/T 23446-2009460
Tensile strength (MPa)GB/T 23446-200920
Tear strength (kN/m)GB/T 23446-200980
Impermeability (0.4 MPa / 2 h)GB/T 23446-2009Impermeable
Wear resistance (750 g / 500 r) / mgHG/T 3831-20064.8
Adhesive strength (MPa), concrete baseGB/T 23446-20093.1
Adhesive strength (MPa), steel baseGB/T 23446-200911
Cathodic disbondment [1.5 V, (65±5)°C, 48 h]HG/T 3831-2006≤15 mm

Chemical Resistance

For reference: the above data is acquired based on GB / T 9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if other specific data is required

Product data table
Exposure itemResult
Acid resistance 10% H2SO4 or 10% HCl, 30 dNo corrosion, no blistering, no peeling
Alkali resistance 10% NaOH, 30 dNo corrosion, no blistering, no peeling
Salt resistance 30 g/L, 30 dNo corrosion, no blistering, no peeling
Salt spray resistance 2000 hNo corrosion, no blistering, no peeling
Oil resistance 0# diesel, crude oil, 30 dNo corrosion, no blistering, no peeling

Application Environment and Guide

Stable coating performance depends on the right site conditions, material temperature and spray setup. Review the application environment and guide values before installation, and confirm final parameters with the latest TDS and project requirements.

Application Environment

Product data table
ConditionRequirement
Environment temperature0°C-45°C
Product spray heating temperature65°C-70°C
Pipe heating temperature55°C-65°C
Relative humidity≤80%
Dew point≥3°C

Application Guide

Product data table
Guide itemRecommendation
Recommend spray machineProfessional polyurea spray equipment
Spray gunFusion-air purge or mechanical purge
Static pressure2300-2500 psi
Dynamic pressure2000-2200 psi
Recommend film thickness1000-3000 μm
Recoating interval≤6 h

Application Note

  • Agitate Part B uniformly before application and thoroughly mix deposited pigments, otherwise product quality may be affected.
  • Spray polyurea within the proper time if the substrate surface is primed. For the application method and interval time of BW polyurea special primer, refer to the related Colorful Whale Advanced Materials (Shanghai) Co., Ltd. brochure.
  • Always apply BW3-951 on a small area before large application to check that the mix ratio, color and spray effect are correct.

Product Curing Time, Shelf Life and Packing

Use the listed curing profile, shelf life, packing and storage requirements for application scheduling, warehouse handling and order planning.

Product Curing Time

The curing time varies with the environment condition, especially temperature and relative humidity.

Product data table
Substrate temperatureDryFoot trafficSolid dry
+10°C20 s45 min7 d
+20°C15 s15 min6 d
+30°C12 s5 min5 d

Shelf Life & Packing

Product data table
ItemDetails
Shelf life from date of manufacturePart A: 10 months · Part B: 10 months, original package sealed
Storage temperature+5-35°C
PackingPart A 210 kg/drum · Part B 200 kg/drum
Packaging requirementKeep the product package tightly sealed
Storage precautionStore in a cool, ventilated place and avoid direct sunlight

Product Health and Safety Information

Product Health and Safety Information

For information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Safety Data Sheet containing physical, ecological, toxicological and other safety-related data.

Integrity Declaration

Colorful Whale Advanced Materials (Shanghai) Co., Ltd. guarantees that the technical data stated in this sheet is based on laboratory tests. Actual testing methods may vary due to different circumstances. Users should test and verify applicability. Colorful Whale Advanced Materials (Shanghai) Co., Ltd. does not take any other responsibility except product quality and reserves the right to modify the listed data without prior notice.

BW3-951 Frequently Asked Questions

Review the main product, substrate, application and document questions before specifying or ordering BW3-951.

BW3-951 is a 100% solids aromatic spray polyurea elastomer formed from an isocyanate component and an amine compound component. It requires professional polyurea spray equipment.

The technical sheet lists automotive manufacturing, metallurgy, chemicals, construction, shipbuilding, film props, marine, electric power and other anticorrosion, waterproof and protective-coating fields.

BW3-951 is positioned as a spray-applied aromatic polyurea elastomer with reduced sensitivity to moisture and temperature during application. BW3-900 is the broader baseline protective coating, while BW3-9512 is positioned for heavier petrochemical and tank-lining review.

Yes. Confirm surface preparation, substrate strength, dryness or moisture condition, primer compatibility, target film thickness and the permitted recoat window before spraying BW3-951.

Confirm whether the project needs an exposed surface layer or color-stable topcoat based on UV exposure, appearance requirements, maintenance conditions and the selected coating-system route.

Check site temperature, humidity, dew point, material heating, spray equipment pressure, mix ratio, film thickness, service exposure and cleaning or chemical-contact conditions.

Request the latest available TDS, SDS, application guidance, packing information, primer recommendation and project-specific review before ordering.

Previous ProductBW3-900View productProduct categoriesAll productsView categoryNext ProductBW3-9512View product

Request BW3-951 Technical Documents or a Quotation

Share the substrate, project area, service environment and application requirements. We can provide available BW3-951 technical documents, packing information, quotation support and coating-system guidance.

By submitting this form, you agree that BW Polyurea may use the information provided to review and respond to this inquiry in accordance with our Privacy Policy. Website use is also subject to our Terms of Use.