Castle Streak Proof is the professional’s first choice for an efficient, non-streaking, and versatile cleaner formulated especially for glass, stainless steel, and metal surfaces. This concentrated, VOC-compliant cleaner contains a special blend of wetting agents, solvents, and soil emulsifying ingredients. It quickly removes films, soils, dirt, grease, fingerprints, and grime with either a squeegee or cloth without streaking or smearing. Streak Proof is non-corrosive and will not harm paint, caulking, chrome, steel, or aluminum when used as directed. 12-pack. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.