Park Tool TLR Threadlockers The Park Tool TLR Threadlockers aid in locking threaded assemblies and keeps them from loosening. Park Tool AP-1 Adhesive Primer must be used to prep all components, fasteners and carbon fiber surfaces prior to application of Park Tool threadlockers or retaining compound. Failure to do so could result in permanently bonded parts. Features Compatible with steel, aluminum, or carbon fiber Oil tolerant Not recommended for titanium threads Manufacturer's Part No: TLR-1, TLR-2 UPC: 763477007667, 763477007674 | Park Tool | Tlr Threadlockers Tlr-1 | Blue | Medium Strength, 10Ml