Live now

Added sources and updated by the Pedalwise team

Threadlocker · Nov 8, 2026, 11:15 PM by Pedalwise team · reviewed Nov 8, 2026, 11:15 PM by Pedalwise team

What changed

6 lines added, 0 removed

27 unchanged lines

2. A local shop, through [find a shop](/find).

## Videos

- [Park Tool Assembly Compounds: TLR-1, TLR-2, RC-1, AP-1](https://www.youtube.com/watch?v=BpzGeLVMvgw) from Park Tool: Explains the strengths of threadlocker and the other assembly compounds and which bolts each one suits.

- [How & Where To Use Grease, Fiber Grip, Threadlock + Anti Seize On Your Bike](https://www.youtube.com/watch?v=mCrY2w7lAlc) from Global Cycling Network: Shows which bolts on a bike get threadlock and which get grease or anti seize instead.

## Guides that use it

7 unchanged lines

- [Park Tool TLR-1 Medium Strength Thread Locker, 10 ml at Excel Sports, excelsports.com](https://excelsports.com/park-tool-tlr-1-medium-strength-thread-locker-10ml-blue)

- [Park Tool, parktool.com](https://www.parktool.com/en-int/blog/repair-help/troubleshooting-a-noisy-drivetrain)

- [Park Tool Assembly Compounds: TLR-1, TLR-2, RC-1, AP-1, youtube.com](https://www.youtube.com/watch?v=BpzGeLVMvgw)

- [How & Where To Use Grease, Fiber Grip, Threadlock + Anti Seize On Your Bike, youtube.com](https://www.youtube.com/watch?v=mCrY2w7lAlc)

Stuck after these checks? [Find a shop near you](/find), or if you're in Austin, [book a Pedalwise tech](/book).

This version

Threadlocker is a liquid that keeps bolts from shaking loose. Use medium strength blue where a part must come apart again; Park Tool's 10 ml bottle lists at $19.95.

Threadlocker is a liquid you put on bolt threads that sets once the bolt is tight, so it won't shake loose. Medium strength can still be undone with hand tools, which is what most bike bolts need.

What it's used for

Chainring bolts and some direct mount chainring lockrings. Park Tool suggests mild threadlocker or grease on chainring bolts (Park Tool). See check cranks and the bottom bracket.
Small bolts that keep backing out, such as bottle cage bolts. The Competitive Cyclist listing gives these as an example use for the blue strength (Competitive Cyclist, Park Tool Threadlocker).
Any bolt your bike or part maker says to secure with threadlocker. Check during a bolt check.

What to look for

Medium strength (blue) for most jobs. The listing says Park Tool's blue is comparable to Loctite 242 and 243 and is for bolts that need to come off easily (Competitive Cyclist).
High strength (red) only where the maker calls for it. The same listing says red is comparable to Loctite 262 and 263 and is for high load bolts that are rarely taken apart, such as suspension pivots (Competitive Cyclist).
Not for titanium. Park Tool recommends anti-seize instead on titanium (Competitive Cyclist).
Prime as directed. Park Tool recommends its primer on parts and carbon surfaces first, and warns that skipping it can leave parts permanently bonded (Competitive Cyclist).

Never put threadlocker on electrical connectors, battery contacts or motor axle nuts unless your bike maker says to.

Best price we found

Park Tool Threadlocker, 10 ml at Competitive Cyclist: $19.95, checked Nov 9, 2026
Park Tool TLR-1 Medium Strength Thread Locker, 10 ml at Excel Sports: $19.95, checked Nov 9, 2026

Prices change often, and a local shop may match them.

Where to buy

A large bike retailer, as above.
A local shop, through find a shop.

Videos

Park Tool Assembly Compounds: TLR-1, TLR-2, RC-1, AP-1 from Park Tool: Explains the strengths of threadlocker and the other assembly compounds and which bolts each one suits.

How & Where To Use Grease, Fiber Grip, Threadlock + Anti Seize On Your Bike from Global Cycling Network: Shows which bolts on a bike get threadlock and which get grease or anti seize instead.

Guides that use it

Sources

Stuck after these checks? Find a shop near you, or if you're in Austin, book a Pedalwise tech.

All versions of this page