Fire damage

How do you get black soot off burnt concrete? This is a area about 50X50 its the underside of a parking garage ramp. The concrete ceiling got high heat during an arson fire. some mattresses were set on fire, it was a semi enclosed area

There is other areas that are just as black or less black with soot about 125x70 that I did a test and can get it clean with just water & pressure but this 50x50 area was hit with the must flames & heat. Its uncoated underside ceiling smooth concrete.

I did try some of PT's concrete cleaner, didn't touch it. Could the ceiling be permanently damaged/black??????? I tried heat, concrete cleaner and high pressure and roto nozzle

Any help thanks

Jeff

Sodium hydroxide with butyl has worked well for me. My area was not as bad as what you describe, but it was a huge mess. I used Morado from www.zep.com

Jeff, Steve Rowlett has/had a chemical designed to remove soot and other fire damage residue. You might want to give him a shout.

Celeste

Jeff, try some F-13 if you have it before you buy anything else.

I used simple green (sodium hydroxide) on my last fire job. Had a house blow up from a meth lab, and the new owner was fixing it up.

Jeff,
If you need help with the fire damage we can help. We have a 20,000 psi hydroblaster that can maybe help with this problem.
EPW #843-833-1134

Hydroxide and EB (butyl) here as well. Have done the insides of chimneys with it.