Zep Klear is a liquid windshield washer, anti-freeze and cleaner. It contains a concentrated mix of solvents, detergents and nonresidual anti-freeze compounds. It keeps washer systems, including reservoirs, pumps, lines and jets, ice-free during cold weather and aids in the removal of frost, snow, and ice, even at sub-zero temperatures. It is designed for windshield washer systems on buses, trucks and automobiles. The product does not harm rubber, plastics or paints when diluted.