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Watco Etch & Clean

Essential for preparing bare concrete ready for painting

  • Acid based, neutralises when it’s done the job
  • Colour change indicator shows when it’s finished
  • Etches and removes dirt and light oil
  • Prevents new paint from flaking and peeling

Frequently bought together


Watco Etch & Clean is the ideal way to prepare concrete and brickwork surfaces for painting. It will remove surface laitance and will also neutralise excess alkalinity in new concrete (concrete must be at least 4 weeks old before use). 


  • Ensures excellent bonding of coatings and reduces alkalinity of new concrete
  • Contains detergent for cleaning action
  • Removes laitance (a weak dusty layer) on new concrete and will provide a key for surface coatings on very smooth concrete
  • Gel formula to provide more even etching over surface
  • Colour change system to indicate neutralisation
Properties Ensures excellent bonding of coatings, reduces the alkalinity of concrete, cleans surfaces prior to painting.
Suitable for Concrete and brickwork.
Interior or Exterior Interior and exterior.
Coverage 20m² per 5L per pack.


Apply Etch & Clean to a maximum area of 20m² per 5 litres in conjunction with harsh scrubbing by a soft broom or machine and leave for 15 minutes until all frothing stops and the formulation has changed from pink to white/clear. Once the colour change has occurred the surface alkalinity has been fully neutralised.

Flush the area with generous amounts of water to remove all traces of Etch & Clean and allow the area to dry thoroughly before painting. Brush and vacuum the surface to remove loosened particles of laitance. If a fine powdery film can still be easily removed from the surface, more etching with Watco Etch & Clean will be necessary.

Data sheets

Safety data sheets

Safety data sheet

Technical data sheets

Technical Data Sheet

£24.20 (Ex VAT)

In stock

Do you know the size of the area?

Tools and accessories

Stiff and Soft 12" Brooms

Stiff and Soft 12" Brooms

For cleaning or applying Watco universal sealer dustproofer

From £10.50  (Ex VAT)

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Help & Advice

Contact our friendly and professional Technical Advisors for expert help and advice for your project. You can give us a call on 01483 418 418 or email

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