It combines a primer and finish in a single, fast drying coat and is specially formulated for manufactured housing facilities. Protect and preserve your below grade architectural surfaces (e.g. concrete foundations) using HydroHalt, a high quality water and vapor barrier membrane. Without water vapor barrier paint , the warm air would release its water inside of the walls and ceilings, where the water would saturate the insulation and framing. This is an ideal building practice in the extreme northern communities of Canada, less so as you come further south. A paint -only solution would be a vapor retarder at best, not a vapor barrier.
If you need a vapor barrier , you need poly. Aluminum paint would likely be the most vapor -restrictive paint , but last I recall there were fire hazards associated with its use. Basement vapor barrier paint is a modern development for water barrier techniques.
In the basement, water vapor can travel up from the ground and affect the walls and floor in the lower half of your home. In new construction, such a vapor barrier is applied to the wall framing before the plaster or drywall is installed. An alternative solution to the condensation problems described might be the use of paints resistant to vapor penetration for interior walls. In effect, the paint itself then might become a vapor barrier.