Loctite 29513 Blue 246 High Temperature Medium Strength Thread Locker, 450 degrees F Maximum Temperature, 10 mL Bottle

Worked very well for my application, seating the set screws for a rifle gas block. Part has not moved a bit since installation. Bought this item because it has a higher temperature rating than standard blue Loctite. Bottle is small that's true, but likely is enough for hundreds of applications if used properly.

High temperature blue Loctite. Why they need to make so many version is bewildering, and the descriptions are vague and overlapping. There must be a more specific use for each product but they don’t really tell you what it is.

I won’t know if it passes the test until it fails, I trust it.

Heat is the enemy of Locktite joints so using the high temperature variety helps keep things secure. However, intentionally heating the joint for easy disassembly becomes less effective, so use only when joints are exposed to a high temperature environment.

Absolutely love this stuff! There bolts on my car exhaust mid pipe would always vibrate loose. A couple drops of this and It stopped all bolts from backing out! Great stuff!