Permatex 25835 High Strength Removable Threadlocker Orange Gel, 35 g

BEWARE Used this on a bunch of M4 button head socket cap screws in a build with 2020 extrusions and drawer slides for a vehicle - worked great, no rattles, easy to use, etc… However - I’m now switching out the slides to something stronger, something I didn’t anticipate needing to do, and it’s been brutal. The M4 screws have a 2.5mm hex head, and so far it’s been impossible to get the proper amount of torque on the screws before stripping them. The only way I’ve been able to get them out successfully so far is by heating each individual screw up with a small butane torch until it gets to around 250° F, then applying strong constant pressure to turn them - this method is 5 for 5 at this point, and now I’m out of butane. What have I learned? Using blue on these M4’s would have ended up saving me what I’m estimating to be 4-6 hours of work in the end. Orange is awesome for an M8 or bigger, maybe an M6, but not for small screws where I can’t get the needed torque.

good stuff. this bottle is massive, don't let the pictures fool you into thinking this will work for your tiny bolts on your robot. this is for large semi-truck nonsense.

Sticks like glue

I well never go back to liquid thread locker again. The gel stays where you put it

I've been well pleased with the Orange Permatex threadlocker. It has the strength for high vibration applications but doesn't require gorilla strength to break it loose. Permatex is a go-to brand.