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Tom7227

That sand with the binder in it for pavers

3 posts in this topic

Probably 10 years ago I put some pavers on a deck that is also the roof of my garage.  I put some of that sand that has some sort of binder in it that is supposed to keep the bricks and pavers in place.  But whatever the chemical is has leached out and stained the aluminum flashing.  Sort of looks like lime scale.  It won't come off with the pressure washer.  Does anyone know what that stuff is or how to take it off?

 

Thanks for your help.

 

Tom

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Tom, I looked it up, and it might be Portland cement.  Or it could some plant based stuff.  Maybe something acidic would take it off?   I might try vinegar on a rag to see if it does anything, and if that works at all, then go to muriatic acid and water, like cleaning up concrete.  

 

There ard also propietary products, example aluma-kleen, for cars and boats but they don't tell what's in them.   Acid seems to be the popular thing.

 

I don't have personal experience with this problem, so maybe someone else has a better suggestion.

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try a product called  CLR cleaner . The name is an abbreviation of the type of stains it removes (calcium ,lime ,rust )

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