(Patent) Fully enclosed anti-flooding safety device for windows. It consists of a foldable anti-flooding barrier with special gaskets on all four sides and a control mechanism operated by a removable front handle; it is complemented by a special perimeter frame to be secured on three sides (left, top, and right); it is manufactured to the required width and height, and a profile for the bottom side can be supplied as an option if the surface quality of that side needs to be addressed: smooth, straight, or within the tolerances required by the gaskets as specified in the manufacturer’s technical manual.