CAUTION: It is strongly recommended that you perform a "PLASTIC SHEET TEST" to check for water vapor in your concrete slab, prior to purchasing a kit.

This test is simply performed by using a plastic garbage bag, placing the bag on your concrete slab and tape around all edges using duct tape. Allow this plastic sheet to remain on the floor for 24 hours. After 24 hours  remove the plastic and if water droplets are formed on the inside of the plastic bag or if the concrete is darkened, then you should NOT purchase a kit.