quote:

Originally posted by RAMIUS:

quote:

Originally posted by cparktd:
Don't use a torch. Heating concrete can cause an explosion due to the trapped moisture it may contain.

Oh give me a break. He'd just heat the paint on the surface until it peels. The concrete won't explode.

Well maybe explode is a bit harsh a term, LOL!
It is none the less a genuine concern.
Just be carefull.

There is some moisture in concrete almost always. Heating the surface past the boiling point can happen quickly and easily with a torch and that can cause the moisture to flash to steam and burst out chunks of the surface. I have seen it happen, more than once on the job site. A sharp pop and bits of concrete go flying. Safety glasses will protect your eyesight but you may still be left with a divot in your floor to patch.