Hardie Board - White stain/build-up

https://eacochem.com/white-deposit/

Not everything white on stone or cement is efflorescence, here is what eaco chem says

You can refer to it however you like, but most of the alternative ā€œwhite depositsā€ they mention are still forms of calcium or salt deposits caused by moisture penetrating the substrate. Both One Restore and NMD80, which are hydrochloric acid-based, can fix these issues. While I’m not discrediting their claims, much of the marketing seems to be just that—marketing. Using technical terms can create an impression of expertise in front of your clients, but the core issue and solution remain straightforward.

Yeah, they make both products. They are PA based company out by the burgh, the masons around me use their products for the most part. That is where I go to buy their stuff, a brick and stone center.

I’ve used eacochem products and am familiar with the brand. I just found it funny that in their list of ā€œalternativesā€ for white stains five out of the seven explanations basically boiled down to moisture passing through the substrate and leaving calcium or salt deposits, which semantics aside, is also what efflorescence is. Call it whatever you want to the customer, it’s the same problem and same fix. My advice from the get-go, since it sounded like they wanted to try and fix it, was to use an acid to remove it. If all else fails the boards will need to be replaced/repainted, but this staining was discussed beforehand so that shouldn’t be done on @cgmckeever dime.

was out that way, and looked. They look like they were patched and then maybe painted. There is def. a noticeable change where the nails are. So Im thinking it was factory painted.

Stopped by the building supply to ask about hardie cleaning, and they looked at me like I had 3 heads as if WHY would anyone ever clean hardie … LOL

Lots of people don’t understand low-maintenance doesn’t mean no-maintenance.

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