vapor seal A barrier applied to a surface to prevent moisture from migrating into, or out, of a given space. A moisture-impervious layer; such as, plastic film, vinyl, or vapor-retardant paint. Found on http://www.wordinfo.info/words/index/info/view_unit/2265/3
vapor seal A barrier applied to a surface to prevent moisture from migrating into, or out, of a given space. A moisture-impervious layer; such as, plastic film, vinyl, or vapor-retardant paint.