is there a spray on cement moisture barrier to use under laminate flooring?
can find at any home improvement store or concrete supplier try to get a latex version so it doesn't interfere with the laminate adhesive if you are doing that type another product is called drylok you can roll it on and the concrete is now basically waterproof
There are water block paints and such... but the cost would be too exorbitant for what you need to accomplish. ALSO.. most laminate floor manufacturers state that a 6 mil plastic sheet vapor barrier is what they require, when installing their products on concrete. (This goes on the concrete, then the foam underpad goes over the plastic sheeting) You can buy 6 mil plastic by the roll.... 10ft x 25ft, or longer.. in clear or black, and isnt that expensive. It's what the manufacturers suggest, I'd stick with it, or you're going to void your flooring warranty.
There is no spray on, brush on, or roll on anything that will serve sufficiently as a moisture barrier. You should be painting all concrete floors with cement paint anyway but that is not enough. You need to install a membrane to act as a vapor barrier. It's a good thing anyway because it will make the floor softer to walk on if you're installing the laminate floor directly over the concrete with no sleeper boards.
