Which concrete water sealer?

[Bill97Z]

I want to put rollout rubber flooring in a section of my garage. I am worried if I have any moisture coming up it will get trapped under the rubber floor and condense. I want to seal the floor with something quality and economical before laying out the 3/8" rubber flooring (which will be free floating in 4' by 10' rolls. Any suggestions?

 

[pauls340]

Yes, what you want is a penetrating sealer, ie; one that penetrates into the concrete and is not a surface sealer...something like a sodium silicate sealer. Any "construction supply" company will have it. Roll it on is the easiest way. Good luck.

 

[AlphaGarage]

It really depends on how much moisture you have coming through the floor. There are different products that will handle increasing amounts of hydrostatic pressure. If you just have a darkening at worst, any penetrating sealer will probably work. If you have puddles developing, you need a specialized sealer, the top dogs aren't cheap either.