Zep® Concentrated Ammonia-Free Glass Cleaner is ideal for removing smudges, dirt and dust from commercial windows. Safe for use on acrylic and tinted windows and glass. Excellent for use in cleaning windows, mirrors and many other hard non-porous surfaces. Concentrated formula provides up tto 32 gallons of ready-to-use cleaner the provides a thorough clean on multiple surfaces. Easy-to-use cleaner with simple, spray and wipe application. Unsafe for use on surfaces that are harmed by water.