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Muiratic Acid and a stiff plastic bristle brush.
Don't wear good clothes, have a hose ready to flush it off the concrete and for sure safety glasses and rubber gloves.
Klean-Strip
1 gal. Green Muriatic Acid
Etches concrete
$7.84 /each
- Brightens concrete and masonry
- 90% lower fumes than standard Muriatic Acid
And after you get the stain gone - next years punkins are going to sit on a nice little wooden stand, right?
The muriatic acid should do the trick. Beware that it will eat a thin layer off the concrete though, its how it works. And maybe degrease the spot first with dishsoap if theres any oils present, for best results.
3000 PSI pressure washer with a rotary nozzle.
thats bada&$3000 PSI pressure washer with a rotary nozzle.
I do have an electric pressure washer, which I tried last year, didn't pull it up - but it's not a 3,000 PSI model either.
Removes body hair, too! (Bone deep that is)
Make sure you have pure white vinegar ready in case you get it on you to use as a neutralizer and DO NOT mix water into it but rather put into water ( acts like hot grease if water is added into it). I use to use this a lot when I power washed for a job. You may just go to Home Depot and get what they sell for driveway cleaning as it isn't as strong. Good muriatic acid should smoke when you open the jug and make sure you have good ventilation. A high concentration of sulfuric acid would also work just make sure you wear good rubber gloves, preferably goggles and rain gear with a no wind day also for either acid.I'll look into that, thanks for the recommendation.
Make sure you have pure white vinegar ready in case you get it on you to use as a neutralizer and DO NOT mix water into it but rather put into water ( acts like hot grease if water is added into it). I use to use this a lot when I power washed for a job. You may just go to Home Depot and get what they sell for driveway cleaning as it isn't as strong. Good muriatic acid should smoke when you open the jug and make sure you have good ventilation. A high concentration of sulfuric acid would also work just make sure you wear good rubber gloves, preferably goggles and rain gear with a no wind day also for either acid.