Threadlocker – Definition & Detailed Explanation – Bicycle Maintenance and Repair Glossary

What is Threadlocker?

Threadlocker is a type of adhesive used to secure threaded fasteners in place. It prevents bolts, screws, and other threaded components from loosening due to vibration or other external forces. Threadlocker comes in liquid form and is applied to the threads of the fastener before it is tightened. Once cured, it creates a strong bond that helps prevent the fastener from coming loose.

When should Threadlocker be used in bicycle maintenance?

Threadlocker is commonly used in bicycle maintenance to prevent bolts and screws from loosening during rides. It is especially useful for components that are subject to constant vibration, such as handlebars, stem bolts, and crankset bolts. Threadlocker can also be used to secure components that are exposed to harsh weather conditions, such as seatpost bolts and rack mounting bolts.

Types of Threadlocker for bicycle repair

There are three main types of threadlocker available for bicycle repair:

1. Low-strength threadlocker (blue): This type of threadlocker is designed for small fasteners that may need to be removed in the future. It provides enough strength to prevent loosening but allows for easy disassembly with hand tools.

2. Medium-strength threadlocker (green): Medium-strength threadlocker is ideal for medium-sized fasteners that require a stronger bond. It offers a balance between strength and removability, making it suitable for components that may need to be adjusted or replaced periodically.

3. High-strength threadlocker (red): High-strength threadlocker is the most permanent option and is best suited for critical fasteners that should never come loose, such as bottom bracket bolts or pedal threads. It requires heat or special tools for removal and should be used sparingly.

How to apply Threadlocker properly on bicycle components

To apply threadlocker properly on bicycle components, follow these steps:

1. Clean the threads: Before applying threadlocker, make sure the threads of the fastener and the receiving hole are clean and free of dirt, grease, or old threadlocker residue.

2. Apply a small amount of threadlocker: Use a dropper or brush to apply a small amount of threadlocker to the threads of the fastener. Be careful not to apply too much, as excess threadlocker can squeeze out and create a mess.

3. Tighten the fastener: Insert the fastener into the receiving hole and tighten it to the recommended torque specification. Allow the threadlocker to cure according to the manufacturer’s instructions before subjecting the component to stress or vibration.

Tips for using Threadlocker effectively in bicycle maintenance

To use threadlocker effectively in bicycle maintenance, consider the following tips:

1. Use the right type of threadlocker for the job: Choose the appropriate strength of threadlocker based on the size and importance of the fastener. Using the wrong type of threadlocker can make removal difficult or compromise the bond.

2. Follow the manufacturer’s instructions: Always read and follow the instructions provided by the threadlocker manufacturer. Different brands may have slightly different application and curing times, so it’s important to use the product correctly.

3. Use threadlocker sparingly: Apply only a small amount of threadlocker to the threads of the fastener. Excess threadlocker can create a mess and may interfere with the proper tightening of the fastener.

Precautions to take when using Threadlocker on bicycle parts

When using threadlocker on bicycle parts, take the following precautions to ensure a safe and effective application:

1. Avoid contact with skin and eyes: Threadlocker can be irritating to the skin and eyes, so wear gloves and safety glasses when handling the product. If skin contact occurs, wash the affected area with soap and water. In case of eye contact, flush the eyes with water and seek medical attention.

2. Use in a well-ventilated area: Threadlocker emits fumes during curing, so it’s important to use it in a well-ventilated area or outdoors. Avoid breathing in the fumes and consider wearing a mask if necessary.

3. Store threadlocker properly: Keep threadlocker containers tightly closed when not in use and store them in a cool, dry place away from heat sources. This will help prolong the shelf life of the product and maintain its effectiveness.

In conclusion, threadlocker is a valuable adhesive for securing threaded fasteners in bicycle maintenance. By choosing the right type of threadlocker, applying it properly, and following safety precautions, cyclists can ensure that their components stay securely in place during rides.