I am in the process of finishing my basement and am now to the hall where the stairs come down from the main floor. I would like to finish this portion of the wall by applying the sheetrock directly to the concrete to get away from having a ledge from framing the wall out. Is their any product that is a good moisture barrier that I can apply straight to the wall with Gorilla glue or something along that line? I know their is water rock but I am not sure if that would be correct for this type of application. I am not in a high humidity climate per se but in Montana you get some pretty good swings in Temoerature and just want to make sure I do it correctly and still get the look I want. Any ideas on products I can use would be great. FYI, I will only need to do this with about 3 1/2 sheets of 4x8 rock. Thanks for the help in advance.