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Henkel Adhesive Technologies

Henkel Adhesive Technologies

Common threadlocker mistakes to avoid

Find some easy mistakes to avoid when using LOCTITE® threadlockers. We can offer some solutions for you if you run into these problems.
5 min.
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When bonding any two surfaces, having the right tool for the task is vital. This is particularly true when working with threaded assemblies.

Common threadlocker mistakes to avoid

Fasteners face tough conditions, including vibrations, environmental extremes, and shocks, making them prone to loosening and leaks. LOCTITE® threadlockers offer decades of high performance, but proper application is key for success in securing threaded assemblies.

Threadlocking mistakes and pitfalls

Improper use of a threadlocker can impact its performance. Before you apply any type of threadlocker, take the time to understand:

  • The properties of the threadlocker being used
  • Where you intend to apply the threadlocker
  • Best practice application

Failure to understand the why, what and how can lead to some of the most common threadlocking mistakes.

Applying the wrong product

At LOCTITE, our experts help you choose the right threadlocker, avoiding common mistakes. Threadlockers vary by strength, temperature range, and thread size. Don't assume the most powerful is always best; red threadlockers are for strong, permanent applications. Misusing them can lead to issues, as they often require heat for removal. Understand threadlocker colors to make the right choice.

Infographic chart comparing the properties of different grades of LOCTITE threadlockers

Using too much adhesive

If you're new to threadlockers, avoid using too much product, thinking it'll improve reliability. In reality, excess adhesive can spread beyond needed areas and not cure properly. To ensure a strong bond, apply a minimal amount precisely where it's needed, even with low-strength products.

Lack of preparation

While LOCTITE threadlockers can handle oil and contaminants, it's crucial to prepare properly. Clean the surface before applying threadlocker to prevent contaminants from interfering with curing. Grease, dirt, or oil in the assembly can slow curing, leading to a weak bond.

Not adhereing to curing time

LOCTITE threadlockers fully cure in 24 hours, and each product has a specific curing time noted in its technical data sheet (TDS). Curing time is distinct from fixture time, which is the point of initial handling strength. Attempting to speed up curing or using the assembly before full curing can cause fastener loosening.

Photo of Loctite Services training in a plant

Repositioning an assembly

When repositioning an assembly with applied threadlocker, it's a common misconception to think it's safe because it hasn't cured. However, doing so can lead to threadlocker failure. Rotating the fastener during the initial anaerobic reaction breaks chemical bonds irreparably. To reposition, remove and reapply threadlocker, or use a wicking grade threadlocker after assembly is set.

Using the wrong tools for removal

Threadlockers are designed for effective yet removable assembly holding. Low and medium-strength types can be removed with hand tools. Red threadlockers often require heat for safe disassembly to avoid damage. Refer to our guide for proper removal. Contact us for expert advice on selecting the right threadlocker or explore our full LOCTITE range.

Mentioned products


  • How to choose the right LOCTITE® threadlocker

    With so many options, sometimes it can be hard to choose which threadlocker is right for you. Luckily here at LOCTITE®, we have provided you with some answers to help you choose what threadlocker is the best fit for you.

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  • How to apply LOCTITE® threadlockers

    LOCTITE® threadlockers tips and tricks on how to apply LOCTITE® threadlockers effectively and efficiently.

    5 min.

  • Photo of LOCTITE 263

    How to remove red threadlocker

    Everything you need to know about removing LOCTITE® High-Strength Threadlockers

    5 min.

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