Heavy-duty tac mats (also known as sticky or contamination control mats) are specialized multilayer floor mats engineered to capture dirt, dust, and particulate debris from footwear and wheeled carts prior to entering sensitive environments. Constructed from stackable, numbered polyethylene layers coated with a high-tack adhesive, each layer lifts away cleanly when saturated to reveal a fresh adhesive sheet beneath. They are essential contamination control supplies for cleanrooms, healthcare facilities, laboratories, construction zones, and industrial maintenance areas requiring strict dust containment.