Have covered the exterior basement walls with Cembrit foundation boards (fiber cement, epoxy, and small stones), Rock coal, black. Now I have a lot of etched cement dust along some edges after the cuts that's impossible to remove. I've tried with a brush, façade cleaner, even pressure washer but it won't come off completely. It's still slightly patchy and discolored.
It's so stupid that in the installation instructions there's nothing about not cutting wet because then the dust can become etched. Or anything else like that.
It's mentioned in another description of some other types of boards which I found by chance.
Cembrit themselves just say it's basically impossible...
Is there any wonder product to get rid of this crap?
It's so stupid that in the installation instructions there's nothing about not cutting wet because then the dust can become etched. Or anything else like that.
It's mentioned in another description of some other types of boards which I found by chance.
Cembrit themselves just say it's basically impossible...
Is there any wonder product to get rid of this crap?