Zep Commercial High Traffic Floor Finish Concentrate. This 1-Gallon concentrate covers up to 2,000 Sq.Ft. and provides a professional-grade floor finish for hard floor surfaces. Its 20% solid formula offers a durable, high gloss shine that resists scuffs and heel marks. The low VOC (less than 1%) product requires little maintenance and is intended for use on interior floors such as rubber, asphalt, vinyl, and sealed concrete. It can be stripped and reapplied as needed.