How to clean a Besser block retaining wall?

[Sheeba]

How to get rid of these white marks on besser block? 

 

[MitchellMc]

Hi @Sheeba,

Those white marks are mineral deposits from water that has leaked out through the wall.  I suspect they'll be difficult to clean off a block wall.

Have you dried a scrubbing brush and a mix of warm water and dishwasher detergent? Failing that you might like to try Chemtech 1L Brick Tile And Paver Cleaner. You'd definitely want to do a test section in an inconspicuous location to make sure that the cleaning product doesn't discolour the brickwork.

Please let me know if you have any questions.

Mitchell

[Sheeba]

thank you - will try this next!