What strength threadlocker is recommended?

[cc2Arider]

Hi all,

Every time I see one of the FFR build videos, they seem to be using red threadlocker. I've been under the impression that red threadlocker is only used for things that should never come apart.

I've been told that blue threadlocker is to retain fastener threads that might need to come apart for maintenance purposes (for example)...

What color (strength) threadlocker have you used in your builds? And for which purpose if you have used both?

Craig C

[Namrups]

I was taught that red was the strongest and in most cases needed heat applied to loosen. Blue was for those fasteners that may need to be undone. The new orange is marketed as being as strong as the red but can be undone without heat. Not sure if any of this is true but it is what I go by.

[edwardb]

Blue unless you have instructions (e.g. Wilwood) that specifically says red. With two caveats: (1) Loctite is not a substitute for proper torque. In many cases that's all that's required. (2) Not required where there's another locking mechanism, e.g. nylon insert, distorted thread, etc.

[J R Jones]

CC
You should follow directions when Loctite is called for. Which grade is dependent on application. Blue treated fasteners are more easily removed, red has higher anerobic bond strength, better gap filling, so the fastener is harder to remove. I have never "not" been able to remove red. Steel fasteners in steel are not challenged. I have not experienced aluminum damage from Loctite.
If the part design is good and the duty cycle is not extreme, no Loctite or blue should be OK.
If the part design is questionable, or the threads are worn/enlarged then red is more appropriate.
If the duty cycle or loads are beyond original intent, red would be appropriate.
Actually there is a Loctite with higher physical properties than red, and it has also worked well for me, but others here take exception, so I will leave it at that.
Another aspect to consider is subsequent application. Red or blue must be completely removed before re-application. Wire brush and/or chasing the threads is required. Red is more difficult to remove than blue..
Use Loctite sparingly, a little goes a long way.
There are primers and accelerant for Loctite but the fumes are hazardous, a vapor respirator is required.
Lock patch pre-applied fasteners are available.
jim

[cc2Arider]

Thanks all for your wisdom and recommendations :)

Craig C