1 Shot by Harvard | 7.5 lb Jar

Non‐Acid / Non Etching Grout Cleaner

1 Shot is a powerful blend of ingredients that cut through dirt and soil to clean and brighten dingy grout in one easy step. Since it is non‐acid and non‐etching, 1 Shot is safe for all natural stones including limestone, marble, travertine, granite and slate as well as ceramic, porcelain and quarry tile.