This concrete cleaner is a dry granular cleaning product that really does the job! A special penetration and emulsification system helps insure removal of dirt, grease, oil and heavy automotive soil. Unique coloring agents identify the area of product coverage for maximum cleaning efficiency. It's completely soluble formula changes from orange to green when wet. This easy rinsing concrete cleaner is an ideal choice for use anywhere heavy grease and grime are chronic. 25 lb box. Cleans approximately 250 to 500 square foot area.