Maarc Mercury is a mercury-based component used in conjunction with amalgam powder to create a durable, high-strength dental filling material. When mixed with the powdered alloy, the liquid forms a pliable mixture that hardens inside the cavity, providing a strong, long-lasting restoration.

The liquid's role is to activate the alloy particles, allowing for an optimal bond that resists wear, corrosion, and decay. It is commonly used in posterior restorations, such as molar fillings, due to its ability to withstand heavy chewing forces. Careful handling is necessary to avoid mercury exposure, and the liquid should be stored in tightly sealed containers to maintain its stability and effectiveness.