I keep seeing recommendations to "Use loctite" and rebuttles, "Don't use loctite, use x/y/z!" Both statements are stupid and wrong, because Loctite is just a brand, not a product, and they make products for just about everything we need in paintball. Here's the deal - I'm going to list FOUR loctite products every gunsmith & DIY Fixer-upper should have, and when to use them... from safest to break-your-shit-est. Where possible I will also list the Permatex equivalent.
GROUP 1 - THREAD SEALANTS / AIR CONNECTION SEALANT / LEAK STOPPERS:
Loctite #567 PST: Thread Sealant
(Permatex #59214 High Temperature Thread Sealant with Teflon)
Use this stuff on every threaded air connection, like macroline fittings or air gauges. Use it wherever you would have used Teflon tape. It's cleaner, wipes off easily, and will never rust or seize. How to use it properly: BEFORE screwing in the fitting, run a small bead of Loctite Thread Sealant halfway around the 2nd and 3rd threads on the end of the fitting. When you screw it in, the paste should smooth out around the whole thing and seal nicely. Wipe up any excess with a kleenex. The joint should be ready to use in about 30 seconds.
Loctite #545: Thread Sealant Hydraulic/Pneumatic Sealant (Loctite PURPLE)
(Permatex #54540 Pneumatic/Hydraulic Sealant)
This stuff is a GLUE. It will hold your threads in place, so if you have a fitting that keeps coming loose and leaks air, this is the stuff for you. You might use this to mount the LPR on a autococker, so that even though the gun shakes, it will never leak air, and never come loose. It's still only going to hold wrench-tight, so you can remove it with a little bit of muscle. Keep in mind that when you seal a joint with #545, you need to let cure overnight before gassing up. Trying to test leaks while this stuff is wet will just blow all the sealant glue out of your joints.
GROUP 2 - THREAD LOCKERS / SCREW GLUE
Loctite #242: Threadlocker Medium Strength (Loctite BLUE)
Loctite #243: Threadlocker Medium Strength, Oil Resistant
(Permatex #24200 Medium Strength Threadlocker BLUE)
This is the all purpose stuff that people should be using if they have a screw that comes loose from the vibration of the marker. Use it to keep autococker cocking rods from coming loose, or trigger frame screws, etc. It's strong enough to keep things from coming loose, but will give fairly easily when you twist at it with a tool. How to use it properly: BEFORE screwing in the bolt, place a medium sized drop of Loctite Blue on the threads just before the end of the bolt. Screw it in as normal. It should look like this:
Loctite #262: Threadlocker High Strength (Loctite RED)
Loctite #271: Threadlocker High Strength (Loctite RED)
(Permatex #27100 High Strength Threadlocker RED)
This is the stuff that's going to get you in trouble. It's stronger than any other glue, and using it on your threads makes a PERMANENT bond. You have to put about 600 lbs of force on the screw to get it off, or take a blowtorch and heat it to about 300 degrees before it will give. Chances are you're going to break your marker before getting the screw out again. Use this stuff SPARINGLY. There's only a small selection of places I would use this, and that's for the screws which take a lot of force - like T-stocks or ASA mounting screws, and drop-forwards/cradles. Use as little as possible, and if you can, avoid using it.
Here's what some of the packaging looks like up close:
Edited by CrazyLittle, 15 April 2011 - 09:36 AM.