The acid washing of concrete is a requirement after the concrete has cured sufficiently, in order to remove surface efflorescence and to open the pores before sealing. This will help the sealer to penetrate and result in a superior bond between the sealer and the surface.
Please refer to our Acid Washing guide below for further information.
A mixture of Permacolour Neutralizer
at one sachet per 20 litres of water is then applied and also rinsed off thoroughly.
Note Acid washing should be done between 2 weeks and no later than 1 month after the concrete is laid.
Download Acid Washing Guide