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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 subsequent coating layer.

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Sealed concrete rooftop surface after BW8009 primer application

Product Description

BW8009 is a two-component sealing primer for prepared porous concrete and compatible mineral substrates. It is designed to penetrate surface pores, help consolidate residual dust, reduce air release from the substrate and provide a more uniform interface before compatible subsequent coatings. Primer selection, substrate moisture, surface preparation, recoating interval and adhesion requirements should be confirmed for the complete 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.
  • Subsequent 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 subsequent 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 subsequent 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
Solids content (%)>60%>60%
Mix ratio (volume ratio)32
Surface dry time1-3 h
Recoating intervalMin 3 h; max 24 h (20°C)
Theoretical coverage (DFT)0.09 kg/m² film thickness 50 µm

Physical Properties

BW8009 physical properties
ItemTest standardResult
Adhesive strength (dry concrete base)GB/T 23446-20093.5 MPa or substrate broken
Impact resistance (kg.cm)GB/T 23446-200960
Wear resistance (700 g / 500 r) mgGB/T 23446-200911
Temperature variation resistance (-40 to +180°C) 24 hGB/9278-1988Normal
Density g/cm³GB/T 6750-20071.02

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

BW8009 chemical resistance
Exposure itemResult
Acid resistance 40% H2SO4 or 15% HCl, 30 dNo corrosion, no blistering, no peeling
Alkali resistance 50% NaOH, 30 dNo corrosion, no blistering, no peeling
Salt resistance 50 g/L, 30 dNo corrosion, no blistering, no peeling
Salt spray resistance 1000 hNo corrosion, no blistering, no peeling
Oil resistance No. 0 diesel fuel, crude oil, 30 dNo corrosion, no blistering, no peeling

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
Ambient temperature5-38°C
Relative humidity35-85%
Concrete pH<10
Substrate water content<10%
Dew-point marginSubstrate temperature must be at least 3°C above the dew point.

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 24 h at 20°C
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
Packing30 kg/set
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.

Technical Data Notice

Values shown are typical laboratory results obtained under the referenced test conditions and are not a project warranty. Actual performance depends on substrate condition, application, film thickness, curing and service exposure. Confirm the latest approved TDS, SDS and project requirements before use.

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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