Copper Cleaning on Concrete

Copper Staining job today: 3.5 million dollar house at Bighorn Country Club (where they have the "Battle at Bighorn" golf tournament). Copper overhang leaked over 4 years to make this copper and hard water stain on his Riverstone driveway. F9 Efflo went on straight, one coat, neutralize and surface clean. 100% came out.






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Yeah so excited about what F9 can do on Copper stains

Very nice. How did you determine it should be applied straight?


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What did you neutralize with?

chrishartje said:

Very nice. How did you determine it should be applied straight?


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Chris I apply it straight on almost everything. I dilute my chems by applying water to the substrate first and then broom it so there is no standing water. Then I apply F9 Efflo as needed. I know how much chem to use by how it forms bubbles and how it reacts with the substrate.


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purepowerwash said:

What did you neutralize with?

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I use EBC with a touch of Sodium Hydroxide


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