DenSureFit uses the same medical-grade materials used by many dentists and is safe for your acrylic denture. Unlike some other reline kits, DenSureFit is tasteless, odorless, has no burning, and stays soft and flexible on your denture. DenSureFit is Zinc free, odorless, and tasteless. DenSureFit is properly listed, registered, and maintains full compliance with FDA regulations. Our silicone (vinyl polysiloxane) and primer are medical grade and are the same materials used by dentists.