[turbomangt]

I have the same problem.. Cement needs to be sealed contary to what people think. The pours can absorb all kinds of stuff. I have to clean mine well next spring. then seal. Keep in mind the two types of sealer. Membrane and penetrating. The penetrating is best, the material goes into the pours of the cement, creating a barrier not to allow contaminants from getting in. I made the mistake of using a membrane type (cheaper) and it didn't hold up. Now I have to make sure it is all off before I use the good stuff. Don't go to a hardware store either, find out where a construction supply company is near you. they will guide you toward what to use. Gary