How to Remove Loctite 2620 Red Threadlocker

    July 8, 2015

One of the questions we get asked pretty frequently around here is “How do I remove Loctite® 2620 Red Threadlocker?” While our red high strength threadlocker is considered a permanent assembly method, it can be removed if you know the right technique.

Removing the red threadlocker involves heating the nut and bolt for a couple of minutes to a temperature of 500°F (250°C), applying localized heat using a blowtorch, for example. This will soften the thermoset plastic in the threadlocker. Once your nut and bolt is heated up, grab your hand wrench and take the assembly apart.

This short video gives a demonstration on removing red threadlocker:

We recommend using Loctite 2620 Red High Strength Threadlocker on fasteners up to ¾” (19mm) in size. It will secure parts that need to withstand heavy shock, vibration, or extreme chemical or environmental conditions. Typical applications include:

  • Suspension bolts
  • Motor and pump mounts
  • Bearing cap bolts and studs

Depending on your job, you may want to consider using our blue medium strength threadlocker, which is removable with hand tools, or one of our other formulations. Not sure which one you need? We’ll help you choose the right threadlocker for the job.

As always, if you have questions about threadlockers, just ask! Send us a note in the comment box below and we’ll get back to you right away.

About the Author, Mike Oliveira

Mike Oliveira is an Application Engineer for Henkel. His present and previous employment has given him experience in assembly equipment, robotics, and electrical related items. Mike has used these job related skills to perform general automotive and household repairs. He earned an Associates Degree in Electrical Engineering Technology and a Bachelor's Degree in Industrial Technology.

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17 responses to “How to Remove Loctite 2620 Red Threadlocker”

  1. Terry Casey says:

    After removing the bolts that have red locker, I want to re-install using blue locker. How do I need to prep for that? I may need to remove them from time to time. If I need to remove the residue from the bolt threads, would I need to somehow remove the residue from the hidden threads as well?

  2. Loren Nauss Loren Nauss says:

    Hi Terry, thank you for the question. A wire brush will take care of prepping the bolt. Small brass brushes work well for cleaning out the female side. Let me know if you have any further questions.

  3. Doug says:


    I sure hope there is a way to remove a cap bolt without having to heat it!
    This cap bolt (actually two) are used to hold down a metal saddle for a sway bar rubber bushing.. Any alternatives to heat?


  4. Mike Oliveira Mike Oliveira says:

    Hi Doug, thanks for your question. I will assume red thread locker is being used for this application. Other than heat, the only other way to loosen up the threadlocker is with a strong solvent like MEK. The problem with this method is that the threaded assembly will likely not allow MEK to penetrate very well, and may not work at all because of this. If the cap bolt is of sufficient size, you may be able to use a breaker bar or an impact gun. That said, you should only use this method if you feel confident about the head of the bolt, so not to strip or snap it off leaving a bigger problem. Hope that helps. – Mike

  5. A. W. Mantle says:

    If you are worried about damage to surrounding materials when heating with a flame, use a hot soldering iron or soldering gun.

  6. Bruce Serdahl says:

    Hi: My name is Bruce. I have a spark plug “blow out”. Big project inside a Van.Anyhow I have an insert to screw into the head. I was wondering what thread locker I would have to use to minimize the risks of having future ” blow outs” of said spark plugs ?
    I Thank You for any assistance that you can give me in resolving this matter at hand . Sincerely , Bruce

    • Brandon Gearing says:

      Hi Bruce, thank you for your question. We have a few follow up questions to ask in order to make a suggestion. What is the size of the bolts? What are they made of? Do you want a permanent bond or do you want to be able to remove these parts? Will you be able to clean the parts? Are the parts contaminated? Alternatively, if you would like to speak to our team directly you can call us at 1-800-LOCTITE. – Brandon

  7. Rob says:

    Where is the video you mention?

  8. Dan Timberlake says:

    Literature says Loctite 2620 is rated to 650° F continuous. If 500° F makes it removable I don’t understand the 650° F rating.

  9. Kelvin says:

    Hi, would res 2620 be suitable for gas burner applications. radiant heat up to 300 deg.
    Thanks Kelvin

  10. […] minded person that I trust. Here is a link to loc-tite video that explains some release methods: How to Remove Loctite 2620 Red Threadlocker – Henkel Adhesive Technologies Blog antwerpflash is online now   Quote Quick Reply […]

  11. Aditya says:

    Hi, would I be able to remove exhaust bolts with a pneumatic tool? They have a little bit excess red loc tite on them. Or will this method strip any of my hardware?

  12. I am tired of the plugs blowing out of my 2001 ford supercrew with 5.4 engine. Which loctite should i use on the remaining spark plugs that does not have a insert in them yet? I understand that it is not recommended but after having plugs changed I am blowing one every 1k miles.

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