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U.S. Patented, U.S. Made, high density clear transparent dual-durometer extruded vinyl aerodynamic ceiling fan blade attachments, easily attached to existing ceiling fans without tools by the consumer to the trailing edge of a traditional flat fan blades with affixed, positioned clear, peel and stick high-bond acrylic adhesive which increase air flow from traditional flat ceiling fan blades at all fan speeds. In cooling mode, fan-dam functions as a spoiler, increasing the volume of cooling down-wash breeze. In heating mode, fan-dam functions as an air-dam, improving warm air re-circulation throughout the room. Unique, patented flexible design increases safety and reduces inefficient drag at higher blade speeds.