DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Bricks, Masonry and Concrete > Odd concrete stain- simple fix or a nightmare in the making?

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Old 07-04-2014, 01:45 PM  
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You can get a less caustic version at HD. It's lower in fumes also. The directions say to mix it in a plastic sprinkler can co I don't think you have to worry too much about your siding.
I just did my front walkway and was concerned about runoff killing my lawn but it didn't. Mix it into water, pour on your stained area, let it sit for a few minutes, don't let it dry and scrub with a bristle brush...not metal. Rinse well. Just follow the directions on the gal jug.
If it doesn't come out and you still want to cover it, you could use a solid concrete stain, or get a bigger welcome mat.

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Old 07-13-2014, 07:53 PM  
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We tried the acid, it helped remove the stain but didn't really improve the appearance of the porch.

Then the phone rang and a Realtor scheduled a preview for one of her customers, so that got us in gear. Quick run to Lowe's to pick up some of the new thick restore paint.

We got the section with the stain covered before she arrived- mission accomplished, LOL.

Now that it's completely painted, it looks nice.

Thank you for all of the replies.

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Old 07-13-2014, 08:46 PM  
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When doing concrete etching (in preparation for staining) I have used a plastic watering can to distribute the acid. Easier to mix and control. Then you can use a stiff bristled brush to scrub the surface. Wear chemical resistant gloves and DO NOT kneel in the acid.

You want the surface to be dry and let the acid sit for 10-20 minutes before scrubbing. That should really attack the stains. However, do not let the surface dry, so scrub sooner if necessary.

Once you have done this, the surface should be clean. If not, then concrete paint might be your only option.

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Old 07-14-2014, 09:43 AM  
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Put some protection on your siding in any case. The bristles from a scrub brush can throw some spatter (splatter?) that you might not even notice.

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Old 07-14-2014, 03:33 PM  
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Pay attantion boys, it;s been painted already.

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Old 07-14-2014, 03:50 PM  
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Originally Posted by nealtw View Post
Pay attantion boys, it;s been painted already.

Just cause it's not broke Anymore, doesn't mean we can't keep on fixin it.
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Old 07-27-2014, 01:58 PM  
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that's odd,,, we acid-stain & NEVER use acid to etch as it uses up the free lime in the cement thereby rendering the stain less potent,,, nor do any pro stainers we know,,, IF we must clean the conc, we'll use a lo-rpm buffer, black pad, & tsp,,, we also stain wet - 1 sprayer for water & another for acid stain,,, 2 light coats allow more predictable results than 1 heavy coat,,, when i hear the acid-stain didn't ' work ' properly, its because of the aforementioned

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