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Two-Component Sealing and Penetrating Polyurea Primer for Concrete

BW8009

Two-component high-penetration concrete sealing primer for prepared porous concrete and compatible mineral substrates. It helps penetrate the surface, seal pores, consolidate the base and improve adhesion for the following coating layer.

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Sealed concrete rooftop surface after BW8009 primer application

Product Description

The anticorrosive coating is a complete system consisting of primer, intermediate coat and topcoat. The primer serves as the foundation of the entire coating system, directly determining the overall quality of the coating. In the coating system, the primer undertakes two core functions: first, it penetrates into the substrate, consolidates residual dust to reinforce the base, and seals moisture and air on the substrate surface; second, it has excellent compatibility with subsequent coatings and enhances the adhesive strength between the coating and the substrate. BW8009 two-component sealing primer features high permeability and sealing performance. It is environmentally friendly, widely applied to concrete substrates, and effectively improves the overall quality of the entire coating system.

BW8009 concrete sealing penetration primer official product packaging image

Application Scope

BW8009 is used as a primer coating for concrete, marble, ceramic tile, wood and compatible substrates where sealing penetration and adhesion support are required before follow-up coatings.

  • Concrete SubstratesPrimer review for prepared porous concrete surfaces before compatible coating systems.
  • Marble and Ceramic TileSurface wet-out and adhesion support after cleaning, surface preparation and compatibility review.
  • Wood SubstratesPrepared wood surfaces can be reviewed where sealing, drying and following-coat compatibility are confirmed.
  • Following CoatingsUse BW8009 only as the primer step before compatible coating layers and within the listed recoating interval.

Designed to Improve the Coating Foundation

BW8009 helps prepare porous concrete and compatible substrates before the main protective layer. It supports substrate wet-out, pore sealing, interface stability and adhesion for the following coating system.

3.5 MPaAdhesive StrengthThe data supports adhesion review on dry concrete bases after proper preparation.
-40 to +180°CTemperature Variation ResistanceThe listed 24 h temperature-variation test result is normal under the stated condition.
1.02 g/cm³DensityProvides listed density data for primer material comparison and system planning.
1000 µmRecommended DFTSupports thicker primer filling and scraping work where the project requires substrate pore treatment.

Product Features and Advantages

BW8009 supports concrete coating-system foundations by penetrating surface pinholes, sealing pores, consolidating residual dust and improving adhesion between porous substrates and the following coating layer.

Sealing and Penetration Support

  • Substrate PenetrationExcellent penetrating quality helps the primer infiltrate pinholes and small defects on the substrate surface.
  • Surface ConsolidationHelps consolidate residual dust and reinforce the base before follow-up coating work.
  • Pore SealingSupports sealing of moisture and air at the substrate surface when the listed substrate conditions are met.
  • Dense Primer FilmForms a dense and solid primer layer with shielding support before compatible coatings.

Coating System Support

  • Adhesion ImprovementHelps improve adhesive strength between the substrate and the following compatible coating layer.
  • Waterproofing SupportThe technical sheet highlights waterproof performance for prepared substrate primer use.
  • Temperature Variation ResistanceThe listed physical data supports review under the stated laboratory test condition.
  • Coverage PlanningThe listed theoretical coverage helps estimate primer use at 50 micrometers film thickness.

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

BW8009 product information
ItemPart APart B
AppearancePale yellow liquidAdjustable
Specific gravity (g/cm³)1.021.10
Viscosity (cps) @ 25°C220260
Solid content (%)>60%>60%
Mix ratio (volume ratio)32
Surface dry time1-3 h
Recoating intervalMin 3 h; max 168 h
Theoretical coverage (DFT)0.09 kg/m² film thickness 50 µm

Physical Properties

BW8009 physical properties
ItemTest standardResult
Adhesive strength (dry concrete base)ASTM D-33593.5 MPa or substrate broken
Impact resistance (kg.cm)GB/T 23446-200960
Wear resistance (700 g / 500 r) mgGB/T 173211
Temperature variation resistance (-40 to +180°C) 24 hGB/9278-1988Normal
Density g/cm³GB/T 6750-20071.02

Application Guide

BW8009 application guide
Guide itemRecommendation
Mixing ratioPart A:Part B = 3:2 by volume
Recommended dry film thickness1000 µm
Theoretical coverage reference0.09 kg/m² at 50 µm
Recoating intervalMinimum 3 h; maximum 168 h
Coating methodScraping
Mixed-material handlingPour only the amount needed and use within 1 hour
Quartz sand or quartz powderMix Part A and Part B in the correct ratio, then mix with quartz sand or quartz powder for use
Solvent restrictionDo not add organic solvents or other coatings

Application Environment and Guide

Stable primer performance depends on the right substrate condition, site environment, mixing control and application timing. Review the guide values before installation and confirm final parameters with the latest TDS and project requirements.

Application Environment

BW8009 application environment
ConditionRequirement
Environment temperature5-38°C
Relative humidity35-85%
Concrete pH<10
Substrate water content<10%
Dew point≥3°C

Application Guide

BW8009 application guide
Guide itemRecommendation
Mixing ratioPart A:Part B = 3:2 by volume
Recommended dry film thickness1000 µm
Theoretical coverage reference0.09 kg/m² at 50 µm
Recoating intervalMinimum 3 h; maximum 168 h
Coating methodScraping
Mixed-material handlingPour only the amount needed and use within 1 hour
Quartz sand or quartz powderMix Part A and Part B in the correct ratio, then mix with quartz sand or quartz powder for use
Solvent restrictionDo not add organic solvents or other coatings

Substrate and Application Notes

  • The concrete substrate should be fully cured, clean, dry, dense and free from oil or stains.
  • Repair obvious damaged interfaces and cracks before primer application.
  • Remove surface dust by air grinding or vacuum cleaning before using BW8009.
  • Mix the paint evenly before use, pour out only the amount that can be used, and close the lid immediately.
  • The poured material must be used within 60 minutes. Do not return remaining material to the original barrel.
  • Do not add organic solvents or other coatings.

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.

BW8009 curing time
Substrate temperatureSurface dry timeFoot trafficSolid cure time
+10°C6 h24 h7 d
+20°C4 h12 h7 d
+30°C2 h6 h7 d

Shelf Life & Packing

BW8009 shelf life and packing
ItemDetails
Storage temperature5°C-35°C
Shelf life10 months, sealed
PackingPart A: 24 kg/bucket; Part B: 16 kg/bucket
Package requirementKeep the product package tightly sealed
Storage precautionStore in a cool, ventilated place, avoid direct sunshine and keep away from heat

Product Health and Safety Information

Product health and safety information

For information and advice on safe handling, storage and disposal of chemical products, users should refer to the most recent 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 tests. Actual testing methods may vary under different circumstances, so project teams should test and verify suitability before full system application.

FAQ about BW8009 Concrete Sealing Penetrating Primer

These answers support primer selection, concrete substrate review, mixing control and coating-system planning before ordering.

BW8009 is a two-component sealing and penetrating polyurea primer used on prepared concrete and compatible mineral substrates before compatible follow-up coatings.

BW8009 is a two-component primer with a listed 3:2 Part A to Part B ratio. BW8007 is a one-component moisture-curing primer. Both require substrate preparation and following-coat compatibility review.

BW8009 is a primer layer for substrate penetration, pore sealing and adhesion support. It should not be presented as the main waterproofing membrane, finish coat or complete corrosion-control layer.

The technical sheet says the concrete substrate should be fully cured, clean, dry, dense and free from oil or stains. Obvious damaged interfaces and cracks should be repaired before dust removal.

The technical sheet lists the Part A to Part B mix ratio as 3:2 by volume. Accurate proportioning and complete mixing are required before application.

Prepare only the amount needed, close the package quickly after pouring, and use the poured material within 1 hour. Remaining material should not be returned to the original container.

Buyers can request the latest TDS, SDS, packing information, substrate-preparation guidance and project-specific primer review before ordering.

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