Have to opportunity to bid on cleaning some brick walls in a small HOA community. They want the white removed from the brick, they say due to irrigation system. I think it’s efflorescence. The orange is obviously rust. Thought process is to use the F9 Calcium and Efflorescence via 12v or pump up, then medium pressure to rinse. Just want to make sure I am on the correct path before I put in a bid. Included some pictures for reference. Thanks
I would not use a 12v for that situation. Neutralizing before rinsing is also a good idea, especially with the plants being next to the brick being cleaned.
Copy on the 12v, I’ll use a pump up. What do I use to neutralize the F9?
I guess F9 contains hydrochloric acid, and that probably is what you want to neutralize in this case, then acids get neutralized by bases and vice-versa, I would’ve used baking soda solution of ratio of 1 part baking soda to 10 parts water to neutralize it.
F9 Double Eagle for neutralizing
Hit it with a strong sh solution first to remove the organic growth. Clean it with pressure if needed. Rinse very well. Then attack the efflorecence.
Efflorescence I’ve never had good luck removing.,
Make sure to set realistic expectations
My experience has been that it looks great for a few days but then new salt deposits come to the surface about a week later
Those few plants, throw a tarp over and use your 12v.
Thanks for all the input. Im going to submit my bid for removing the organic matter then the efflorescence. Ill cover the plants and make sure to tell them it is more than likely going to come back. Other than that, need to order some F9 if/when they accept and then get to it.
How did it turn out