Firwood 2709 Concrete Etching Fluid

Firwood 2709 Concrete Etching Fluid

For the pre treatment of concrete floors prior to application of floors paint to remove surface laitance

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£22.05 each [+VAT]
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5+ for £20.85 each [+VAT]

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Professional Users - Please register for a trade account for regular purchases. Click here to apply for an account.

An acid etching solution designed for the pre-treatment of concrete surfaces.

Concrete etching fluid is an ideal way to prepare concrete surfaces for painting. It will remove surface laitance, which is an easily abraded surface layer. To test for laitance, scrape a coin across the surface and if a fine powdery film is easily removed then surface laitance is present.

Concrete etching fluid will also neutralise excess alkalinity in new concrete (new concrete must be at least 4 weeks old) and also create a key on very smooth concrete surfaces.

  • Pre-treatment for concrete surfaces
Coverage: Approximately 5m² per 1 litre. Coverage can be affected by such variables as type and condition of substrate, type of application equipment and individual method of application.
Typical applications:

  • Factory Floors
  • Warehouses
  • Workshops
  • Showrooms
Compliance: Pre treatment solution, not in scope of 2004/42 EC Please refer to Material Safety data Sheet and Technical Information Sheet prior to the use of this product. See download tab.



Application Methods: Non-metallic watering can + brush

Colour Availability: Clear Pack Size: 5 litres

Coverage: Approximately 5m² per 1 litre. Coverage can be affected by such variables as type and condition of substrate, type of application equipment and individual method of application.

Storage: Store in temperature range 5-40ºC





Directions for Use: Surfaces should be free from dust, dirt, grease, oil and other contaminants. Pre-wet concrete surface with clean water ensuring that surface is uniformly wet without any puddles or standing water.

Apply acid etching fluid uniformly over the surface using a plastic watering can with rose sprinkler or acid tolerant pump unit.

During the application process, scrub the acid solution into the concrete using a stiff bristle brush.
Allow the acid solution to remain on the concrete as long as the bubbling continues (normally between 2-10 mins).

When the bubbling slows noticeably, flush the surface with plenty of water to remove all traces of the acid solution.

Check surface profile. Etching should produce a concrete surface which is clean and has a slightly
roughened profile. If desired surface roughening is not achieved, repeat etching procedure.

Check the pH level of the rinse water on the wet surface with pH paper. Ideal pH level is 7.0 (neutral), but a pH range of 6.0 - 9.0 is acceptable for most coatings. If the pH is below 6.0, residual acid still remains and the surface must be rinsed again and rinse water rechecked.

Allow the concrete to dry thoroughly and prior to painting brush and vacuum the surface to remove any traces of laitance or other residue.




Please click here to download the Technical Information Sheet PDF.

Please click here to download the Material Safety Data Sheet PDF.

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