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Alka SEAL – 25% Concrete Sealer 20 litre -Clear

$200.00 inc GST

Alkaseal: A penetrating, non-yellowing sealer for concrete floors. Easy to apply, resistant to oils/greases, suitable for exterior use.

SKU: 15188E Categories: ,

Alka Seal-Clear 20kg

Alka Seal serves as a penetrating non-yellowing protective sealer designed for concrete floors.


Alka Seal is an economical sealer suitable for various applications, including:

  • Warehouses and storage facilities
  • Car parks and garages
  • Light industrial buildings
  • Exterior pavements


These are the advantages of Alka Seal:

  • Easy application
  • Good resistance to oils and greases
  • Suitable for exterior exposure
  • Non-yellowing
  • Available in clear packaging

Packaging, Storage, and Shelf Life:

Packaged in 20-litre drums, Alka Seal has a shelf life of 24 months. It should be stored away from direct sunlight, naked flames, sparks, and heat, with a flash point greater than 25°C.

Instructions for Use:

Surface Preparation:

Ensure the substrate is clean, free from dust, surface water, and contaminants. Remove loose materials and laitance. Use shot blasting, high-pressure water blasting, or scabbling for larger areas, and needle gunning or bush hammering for smaller areas. The substrate should have a minimum tensile strength of 1.5 MPa. Pre-wetting is not necessary except on absorbent substrates or when intense sunlight is expected. Avoid standing water.


Approximately 5-10 m² per liter for open or textured surfaces, and 10-15 m² per liter for sealed or closed surfaces. Normally, apply 2 to 3 coats.


Apply with a brush or roller, with a recommended thickness of 30-40 microns per coat. Avoid ponding. It becomes tack-free in 1-2 hours, with a re-coat time of 2 to 4 hours.


Clean tools immediately with water after use. Once cured, Alka Seal can only be removed mechanically.

Application Instructions:

Alka Seal can be applied by spray or roller. Apply the first and possibly the second coat at falling temperatures to prevent air bubbles and maximise penetration. Furthermore, Premature exposure to moisture may cause whitening or clouding of the finished product. And, Conduct a trial area before full application, ensuring even application and avoiding excess product on the surface. Imperfections may be visible through the thin coating.

Alka Seal technical Data Sheet


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  • Self-priming
  • Easy application
  • Excellent resistance to oils and greases
  • Suitable for outdoor exposure
  • Non-yellowing
  • Available in clear and various colors

Alka seal

Colour accuracy disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.

Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.

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