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BW3-9007 Traffic Tunnel Fire-Retardant Polyurea Anti-Corrosion Protective Coating

BW3-9007

Fire-retardant aromatic spray polyurea coating for traffic tunnel waterproofing, anti-corrosion protection and seamless protective lining systems.

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Finished light-gray spray polyurea protective coating inside a traffic tunnel

Product Description

BW3-9007 Fire-Retardant Polyurea Special for Traffic Tunnels is a 100% solids aromatic polyurea elastomer. It not only inherits the excellent mechanical properties of polyurea materials, but also features self-extinguishing performance upon removal of the ignition source, and is now widely applied in traffic tunnel projects across China.

BW3-9007 Part A and Part B product drums

Application Scope

BW3-9007 is used for waterproofing, anti-corrosion, fire-retardant and protective coating work in railway tunnels, road tunnels, urban subway tunnels and related transportation facilities.

  • Railway TunnelsProtective coating review for prepared railway tunnel structures where waterproofing, corrosion protection and fire-safety review are required.
  • Road TunnelsSeamless spray-applied protection for prepared road tunnel concrete or steel surfaces and detail areas.
  • Urban Subway TunnelsProtective coating review for subway tunnel and underground transportation structures after substrate and ventilation confirmation.
  • Transportation FacilitiesWaterproofing, anti-corrosion and fire-retardant protection review for compatible prepared transportation infrastructure surfaces.

Designed for Tunnel Waterproofing with B2 Fire-Retardant Review

BW3-9007 helps create a continuous spray-applied protective layer for railway, road and urban subway tunnel surfaces where waterproofing, anti-corrosion protection and fire-safety requirements need to be reviewed together. Use the listed B2 data together with the current test report, tested coating build and project specification.

B2Fire-Retardant ReferenceProvides listed GB 8624-2012 B2 data for tunnel coating review, with final use confirmed by report, build and local requirements.
5-7 sGel TimeSupports fast spray build on tunnel walls, arches, curved surfaces and detail areas, helping the membrane stay in place.
12 MPaTensile StrengthProvides mechanical resistance for tunnel and transportation structures exposed to protective-coating service.
300%ElongationHelps the membrane flex with substrate movement and maintain continuity around joints, corners and transitions.

Product Features and Advantages

BW3-9007 combines spray-applied membrane continuity with tunnel-oriented protection, supporting waterproofing, anti-corrosion performance and listed fire-retardant reference data within one protective coating route.

Film Formation and Application

  • Solvent-Free 100% SolidsBuilds film without solvent evaporation, helping support dense tunnel membrane formation and consistent coating build.
  • Fast Spray BuildSupports application on tunnel walls, arches, slopes and vertical areas where sagging control matters.
  • Dense Seamless FlexibilityForms a continuous coating across prepared tunnel surfaces, joints, corners and detail transitions.
  • Self-Extinguishing BehaviorThe product description notes self-extinguishing behavior after ignition-source removal; confirm current fire data for each project.
  • Construction Efficiency SupportFast curing can help shorten waiting time between spray work and the next tunnel construction stage.

Tunnel Protection Performance

  • B2 Fire-Retardant ReferenceProvides listed GB 8624-2012 B2 class data for traffic tunnel coating review with the tested build and project requirement.
  • Adhesion to Prepared SubstratesSupports bonding to steel, concrete, wood, glass fiber and other compatible substrates after proper preparation.
  • Impact and Abrasion ResistanceHelps protect tunnel surfaces exposed to construction wear, traffic-related service and maintenance activity.
  • Chemical Resistance ReviewSupports anticorrosion review for acids, alkali, salts, oils and other listed media under stated test conditions.
  • Waterproof and Impermeable ProtectionForms a continuous barrier for compatible prepared tunnel substrates and underground structures.

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)1.121.25
Viscosity (cps) @ 25°C800900
Solid content (%)100100
Mix ratio (by volume)11
Gel time (s) @ 25°C5-7
Theoretical coverage (DFT)1.08 kg/m² film thickness: 1 mm

Physical Properties

Product data table
ItemTest standardResult
Hardness (Shore A)GB/T 23446-200992
Elongation rate (%)GB/T 23446-2009300
Tensile strength (MPa)GB/T 23446-200912
Tear strength (kN/m)GB/T 23446-200960
Impermeability (0.4 MPa / 2 h)GB/T 23446-2009Impermeable
Wear resistance (750 g / 500 r) / mgHG/T 3831-20066.2
Adhesive strength (MPa), concrete baseGB/T 23446-20093.2
Adhesive strength (MPa), steel baseGB/T 23446-200910.3
Cathodic disbondment [1.5 V, (65±5)°C, 48 h]HG/T 3831-2006≤15 mm
Fire-retardant performanceGB 8624-2012B2 class

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
Hose heating temperature55°C-65°C
Relative humidity≤90%
Dew point≥3°C

Application Guide

Product data table
Guide itemRecommendation
Recommend spray machineGRACO H-XP3 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 BW3-9007 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°C30 s45 min7 d
+20°C23 s15 min6 d
+30°C17 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.

BW3-9007 Frequently Asked Questions

Review the main product, B2 fire-retardant, substrate, application and document questions before specifying or ordering BW3-9007.

BW3-9007 is a 100% solids aromatic spray polyurea elastomer for traffic tunnel waterproofing, anti-corrosion and fire-retardant protective coating work. It requires professional polyurea spray equipment.

The technical sheet lists tunnel waterproofing, anti-corrosion, fire-retardant and protective coating work in railway, road and urban subway transportation facilities.

Use the B2 information as a project-review reference and confirm the current test report, tested specimen, coating build, local fire-safety requirements and final specification before ordering.

BW3-9007 is the traffic-tunnel-focused fire-retardant spray polyurea option. BW3-900 remains the broader aromatic spray polyurea for general waterproofing, lining and corrosion-protection work.

Confirm concrete or steel surface preparation, substrate moisture, primer compatibility, ventilation, film thickness, drainage details and the permitted recoat window before application.

Review site temperature, relative humidity, dew point, material heating, pipe heating, spray equipment, pressure, film thickness and recoating interval before installation.

Request the latest TDS, SDS, fire-retardant data, application guidance, primer recommendation and project-specific review before ordering BW3-9007.

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