Park Tool TLR-1 Medium Strength Threadlocker is great for any threaded assembly found on a bicycle, including threaded bottom bracket cups, disc brake rotor bolts, stem bolts, and more. Adds security and longevity to any threaded application while still allowing for future removal.

TLR-1 is oil tolerant and compatible with steel and aluminum threads (not recommended for titanium threads). Competes with Loctite 242/243.

It is recommended to first prepare threaded surfaces with Park Tool AP-1 Adhesive Primer, which accelerates curing and eases future removal.

CAUTION: Some painted surfaces can be sensitive to threadlockers, retaining compounds and primers. Test first on an inconspicuous area to see if it causes a stain or discoloration. Clean off any excess from painted surfaces immediately.

Park Tool offers a full line of products for thread preparation, including our line of threadlockers and retaining compounds: