If you're looking for a cement dissolver, there are a few options available in the market. One common solution is to use acid-based products specifically designed to break down and dissolve hardened cement. These products typically contain ingredients like hydrochloric acid or phosphoric acid, which work by chemically reacting with the calcium compounds in the cement, causing them to break apart and become soluble. However, it's important to handle these products with care, as they can be corrosive and harmful if not used properly. Always follow the manufacturer's instructions and take appropriate safety precautions, such as wearing protective gear and working in a well-ventilated area.