One Restore on flagstone

I’ve searched a bit and don’t see too much about this. Has anybody had good success using one restore on Flagstone? Natural unsealed stone. Echochem says to use heritage restorer but I don’t have any and can’t get any time soon. I have some iron stains I need to remove. It’s working great on the smooth stucco walls for this same stain, but nervous about messing up the flagstone…

I used it on some porcelain tiles and it turned out great. Removed all the rust. Contact echochem and ask about it, their pretty good at getting back with you…I tested it on some unsealed stone and it discolored it, I forgot what the stone was though?

I would be super careful. I used NMD80 (another acidic echochem product) on flagstone, and it washed out some of the red coloring. You’re probably familiar with that thread…

I even did a pretty decent-sized test spot which turned out ok, but some of the other stones did not. Just remember that natural stone has a lot of variability.

If you decide to use it, I would recommend using a shorter dwell time and making sure everything stays on the wetter side. Maybe do it in portions so that if you do run into an area that is going to discolor, you haven’t already applied it everywhere.

Have you checked the F9 cookbook? I know it has a section on horizontal stone, but I don’t know what warnings it might have about flagstone.

I would have to advise against treating it, or you can leave it to the customer. They would need to be ok with the worst-case scenario… The stone gets discolored but the rust is still there.

As far as I know, natural red coloring and rust have similar chemical compositions. I doubt there are many products that target one and not the other.

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I just checked out heritage restorer, and I don’t see flagstone on the list. Here is the list on the data sheet:

Brick, limestone, sandstone, concrete, precast, exposed aggregate, granite, unpolished marble, synthetic stone and terrazzo,.

Thanks for all the input! I called ecochem back and talked to another guy about using it on cobblestone. We talked about using it on flagstone again and he said the first guy must of been thinking of bluestone when he told me not to use it on flagstone. It ended up working out beautifully. I tried both F9 barc and efflow, ultimately at pretty high concentrations (1:1) and they did absolutely nothing for it. I love F9 but in this case One Restore is what worked. Typically my process for flagstone is high pressure and high heat followed by straight 12.5% sh sprayed and then painted on around the edges with a pole and soft blue brush. This usually makes it look brand new when it dries. In this case the iron from the water was so bad it I had to do something. The One Restore got it out, used it full strength, agitated it in with medium bristle brush and rinse just before drying. I did so test spots and made sure to dry it before continuing. There’s a guy on YouTube, professional cleaner think his name is Mathis and he has videos where he pulls the one restore through his A.R. 45 with the soap valve all the way open and the sh off. Echochem told me that it won’t really work if it’s diluted, but it seems to work for him coming out at 1:6 it seems. Does anyone dilute one restore and get good results? Yesterday’s job required full strength as the stains were so bad…

I’m glad it worked out for you! Would you be able to post a couple pictures? I’m interested in seeing what you were able to clean.

I believe @Kentucky1234 has experience downstreaming one restore. Can you provide any insight regarding when DS is effective?

Yes you can downstream OneRestore. On fertilizer stains and light rust it works pretty good. I just put a pickup tube right into the gallon jug and go. I do use it though most of the time in a pump up sprayer. It seems to be my go to for a lot of surfaces and stains….


What size pump are you running when you DS it?

For a gas pump.

I’ve downstreamed it thru my 8gpm machine for light mud removal. Does pretty good. Like Kentucky, just dropped my tube down in gal jug.