In just 3 minutes thousands of micro bubbles carry the active oxygen all around the denture killing 99. 9% of bacteria. Provides a powerful in depth clean working where the toothbrush can't go. Use twice daily, Steradent Pro White is formulated to fight against tough stains leaving your denture feeling perfectly clean, smooth and brilliantly white. Suitable for full and partial dentures. The formula is safe to use with your dentures and will not cause damage to metal parts.