Hetman Cork Lubricant is a clear, premium-grade lube that keeps instrument joint corks supple and long-lasting. Does not cake in the joints.All Hetman Musical Instrument lubricants offer superior lubricating qualities, are longer-lasting than other lubricants, and are completely compatible with conventional petroleum-based lubricants, thereby avoiding potential gumming problems. The viscosity of each lubricant is carefully calculated for its specific purpose and assures both a fast, positive action and vital protection against wear and corrosion.Squeeze bottle make application easy.