Feel secure and comfortable all day long with these triple action denture fixative seals. Seabond Denture Fixative Seals Uppers are guaranteed to remain tight on your gums so there's no need to worry about them slipping off. They are designed to be cleaner than other uppers, with a mess-free seal with no ooze from pastes, which makes clean-ups simpler. Key benefit All-day hold Protects gums Helps seal out food particles.