To think vomit stain will stay on concrete forever?

[Lis1992]

I’m at my wits end trying to clean outside our front porch. I vomited there last week. I washed with bleach the next day and boiling water…..stain didn’t budge. If bleach doesn’t work- what will?! Help!

Assuming it is pours like marble

oddly- washing up liquid and then olive oil? (any oil would work)

@Alittlebitolderandeeperindebt oh washing up liquid! Stupidly I didn’t think of that. The bleach with hot water created suds and I couldn’t clean it so I was giving up! Thanks a million.

Pressure wash it - the whole of the area.

I meant porous- not pours

@PinkFootstool don’t have one but I could certainly get one to get rid of it! Thanks. I guess I tried to create the same effect with the boiling water I literally sloshed buckets of it over the area!

baking powder, time and the sun.

You shouldn't have put boiling water on it because it's a protein stain and it's like cooking it into the porous concrete.

Try covering it with baking powder and pouring over vinegar and leaving it. Then have a turn with a pressure washer.

Don't scrub or rub as it will just push it further into the "pores".

The acid may have etched the concrete? if so the only way to get rid of it fully would be to resurface all over.

But you could blur the edges by rubbing a weaker acid like lemon juice or diluted white vinegar around the edges of the stain (basically slightly etching the area around the stain so it doesn’t have a hard edge and blends in)

Hot soapy water with a stiff brush