(Patent) The world’s only flood barrier (2022) that folds on both sides, shortening by 90 mm. Folded in this way, it can pass through an outer shutter frame, secondary door frame or security gate frame. Once against the inner door or window frame, extend both sides and compress the gaskets with just ONE finger. Once removed, it leaves no trace, frame, narrowing profile between the side reveals or fixing hole, preserving the opening’s original appearance.