Quartz is one of the hardest known minerals. The smooth and impervious hard surface of QuantumStone does not require sealing or re-finishing and creates a safe and hygienic countertop surface that does not harbor growth of bacteria or other microorganisms.
For stubborn or greasy clean-ups use a gentle liquid cleaner like 409 or Simple Green etc. or ordinary dish washing detergent e.g. Palmolive with warm water and a white Scotch Brite. Never use red or green Scotch Brite on QuantumStone as they contain abrasives and may dull the finish.