Ghost Bond by Pro Hair Labs contains no latex, no harsh solvents or any of the irritants frequently found in cheaper formulations. Designed for oily scalps, high humidity, and heavy perspiration. Ghost Bond XL is new and improved with features that include, extra moisture protection and higher melting point and will hold up to the most intense climates. It's a copolymer based adhesive that comes in a 1.3oz squeeze bottle. This 2-5 week hold hair glue works great on all hair systems, wigs and hairpieces.