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Berger Alkali Sealer

Provides an effective seal and barrier coat to prevent the reaction of alkali salts with paints subsequently applied.

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Material Safety Data SheetProduct Data Sheet
For new or previously painted masonry surfaces as brickwork, concrete, cement and rendering. Berger Alkali Sealer is also used to bind loose chalky surfaces in order to provide a sound surface for application of topcoats. Berger Alkali sealer is recommended as a seal for areas where soil moisture moves upwards into walls and form salt deposits which damages the paint film known as efflorescence.

Features

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Excellent sealing & salt-blocking performanceEfflorescence ResistanceAlkali Resistance

Surface preparation:

  • Concrete and cement surfaces must be completely dry
  • The sealer will NOT prevent blistering of top coats if moisture is present in the surface
  • Once surface is dry, remove any peeling paint with a scraper and any white powder with a dry cloth

 

Application Procedure:

  • Ensure that the concrete has been cured for at least 30 days
  • Remove all efflorescence, other surface contaminants and loose material
  • Wire brush (hand or power tool), dry abrasive blast or wash with high-pressure water jet
  • Check moisture content of concrete with standard moisture meter
  • Proceed if moisture content is <10%
  • If >10% find and resolve moisture source before applying Alkali Sealer

 

Tips: Always remove efflorescence from surface before painting. Failure to do so will result in a poor, friable base, preventing sound adhesion of topcoats.

Tools you will need

Paint Brush

Available Packs


1 Gallon


5 Gallons

1 Coat
10.0 m2/Ltr**

Coverage

On well-prepared surfaces, as per the painting system recommended. Please refer to the Product Data Sheet for surface preparation and method of application.

** Actual coverage may vary from the quoted coverage due to factors such as method and condition of application, surface roughness, and porosity.

Solve Potential Paint Problems

1What is the white powder that comes off the wall when I rub it with my hands?

Chalking is the formation of a white, dusty powder on the paint film, and is actually a natural way for paint to breakdown as it weathers.

What are the possible causes?

  • Long-term exposure of paint film to the elements
  • Use of low-quality interior paint on an exterior surface
  • Over thinning the paint
  • Application of a thin paint film
  • Failure to prime and seal the surface before applying topcoat
  • Painting on a pre-existing chalky surface

What is the solution?

  • Remove chalk residue using a stiff bristle or wire brush
  • Wash with soap and water, and rinse thoroughly by hose or power washer
  • Allow surface to dry and check for any remaining chalk by running a hand over the surface
  • If noticeable chalk is still present, apply Berger Alkali Sealer or Berger Penetrating Liquid
  • If no chalk is present, repaint as normal
  • Repaint with a premium quality exterior coating

We recommend you use these painting systems in order of base coat, first coat, and second coat:


  • Base Coat
    Berger Alkali Sealer

  • First Coat
    Berger Royale Luxury Interior Satin Emulsion

  • Second Coat
    Berger Royale Luxury Interior Satin Emulsion

  • Base Coat
    Berger Alkali Sealer

  • First Coat
    Berger WeatherProof Ultra Semi-Gloss

  • Second Coat
    Berger WeatherProof Ultra Semi-Gloss

  • Base Coat
    Berger Alkali Sealer

  • First Coat
    Berger 303 Flat Emulsion

  • Second Coat
    Berger 303 Flat Emulsion

  • Base Coat
    Berger Alkali Sealer

  • First Coat
    Berger Everglow Low-Sheen Emulsion

  • Second Coat
    Berger Everglow Low-Sheen Emulsion

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