FORMULA 44-40 is the ultimate choice for all types of cleaning. FORMULA 44-40 actually changes color as it works allowing the user to witness the cleaning action right before their eyes. FORMULA 44-40 was specially developed to cut through the toughest of grease but be user friendly in all environments. The ingredients in FORMULA 44-40 are perfect for cleaning concrete floors and those tough areas that require an extra heavy-duty cleaner. Economical and powerful, this product is a must for anyone with concrete cleaning needs.