what is THE strongest loctite?

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TODD said:
Am I missing something here? Is the case not threaded for it to thread into if it goes there? Was just curious why you would need to Loctite in it if it is threaded.
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It's threaded, loctite is like glue, if it's threaded it can obviously back out and with loctite it will prevent that.
 
271 lock tight .good luck getting it apart you have to heat it or you break the bolt or destroy the threads. They make 241 hard to find its red also but more for giving to take it apart.only use 271 if you never want to take it apart it can cause lot of issues
 
Z.hb71 said:
It's threaded, loctite is like glue, if it's threaded it can obviously back out and with loctite it will prevent that.
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Keep in mind though if you are using a 90 degree fitting it can not rotate around because it will now be pulling on the hose at the same time. We use Permatex 56521. It is a thread sealer on our boats engines for both the water fittings and the carb pulse fittings. These are straight fittings and have yet to ever see one back out or turn and it is strong when you are removing it and bites good. We run 18,000 to 21,000 rpm constantly on the water and also running gas and oil mix just like you.
 
Rep732 said:
The same way you found this place. :LOL: and I call bull poop green isn't the strongest its red. Green is a wicking type that seeps past threads on a tightened fastener
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It depends on what green he's referring to, if it's the retaining compound green then your basically destroying the part to get it apart. Although there are several strengths of that as well. We really should be referring to it by the part number not the color. Loctite hasn't done a great job of differentiating color vs series of loctite......
 
C.s said:
Green is strongest
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Great 1st post bro :rolleyes:

"Red" permatex = permanent and strongest

"Blue" permatex = "removable" threadlocker

"Green" permatex = post assembled threadlocker . Green flows like water (blue and red are much thicker) and allegedly will flow into already assembled fasterners. I was schooled that "Green" is a best suited chemical for locking unthreaded metal press fits that potentially could move from vibration. I have some Green formula but never used it.
 
RcJunkie13 said:
stop measuring by colors, IT GOES BY NUMBER (like sean said), green has a higher number than red, and it is still removable, without that much heat. GREEN IS STRONGEST
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No it's not, the strongest loctite on the planet is the mystery whitish looking loctite that Rovan uses from the factory, that crap is so strong even after being heated , I was stripping socket head bolts trying to remove them ! (and when I did manage to get the bolts out the aluminum threads came out as well !
 
Polar_Bus said:
No it's not, the strongest loctite on the planet is the mystery whitish looking loctite that Rovan uses from the factory, that crap is so strong even after being heated , I was stripping socket head bolts trying to remove them ! (and when I did manage to get the bolts out the aluminum threads came out as well !
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rovan used loctite on urs? 🤣
 
Polar_Bus said:
No it's not, the strongest loctite on the planet is the mystery whitish looking loctite that Rovan uses from the factory, that crap is so strong even after being heated , I was stripping socket head bolts trying to remove them ! (and when I did manage to get the bolts out the aluminum threads came out as well !
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The loctite retaining Compounds are the strongest, they are all green. They are made for permanent placements. Ie press fits, bearing retention, ect. The strongest thread locker is red.
Blue medium strength is typically a 242 or 243. I prefer the 243.
Red comes in a few variations from medium high to high strength, the higj strength comes in several viscosity ranges. For our purposes a low to medium viscosity would be best suited for flow abilities in fine threaded fasteners.
262 is a medium/high strength red loctite. It's mill spec and honestly pretty pathetic as far as a permanent thread lock.
263 is a better choice then 262.
271 low viscosity
272 medium viscosity
277 high viscosity
The 270 series are all high strength thread locker.
266 is a red/orange color and is a high temp permanent thread locker
Green thread locker 290 is a wicking grade for very fine/small assemblies that is applied after the fastener is assembled.
The orange Garbage is a permatex brand. It has not impressed me as far as permanent fixtures in high load/stress/vibration areas. I do not reccomend it. It's not as strong as the standard red but stronger then the std blue. I would suggest the medium/high strength 262 in favor of the orange garbage.
 
Now on to retaining Compounds.
620low viscosity, high strength, high temp
638 high strength, fast set time general purpose use. (This is what I use) it can be disassembled with heat, but you gotta get the part very hot before it will give up the ghost.
648 low viscosity, high strength, high temp. Small oil contamination tolerant
We used this version a lot at the machine shop. Basically need to machine the parts to remove them once set or get way hotter then the average person would be comfortable with. Basically think of it as a permanent assembly.
Most of the thread lockers will work best with a primer/ activator and some of them actually require the use of such to get full strength out of the thread lock. Loctite 7649 is a primer/ cleaner that is used with the thread locker, and retaining Compounds. I actually have some, but seldomly use it.
 
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