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

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.

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 thats true, but likely is enough for hundreds of applications if used properly.

Worked great for me

Use this if you are fastening nuts/bolts/studs that will be subjected to heat. It is heat resistant to around 400-450 degrees, F. I called Loctites tech support number ( I got it from a fastener store where I live) and asked which product is good for these situations, and they told me to buy this product. I was using it on studs that hold headers to the head on a water cooled motorcycle. The parts are removable, but you will need to heat the fastener with a heat gun before removal.

I love this high temp version! but it might be harder to remove if heat is required....

Watch out! The 50ml Bottle is shown and was expected, not the 10ml received.

This stuff works great for securing threaded fasteners of accessories on firearms, like scopes, bi-pods, etc. Fasteners will not loosen from the shock, but It can still be removed if you need to.

Shows large bottle, get a small bottle for the price of the large. Rip off.

Not much to say really. I wanted a thread locker that was going to remain strong at up to 300F. this 246 stuff claims to go up to 450F and I have no reason to disbelieve that. My jam-nut is still tight after 2 months on/off heat and vibration going from room temp to 2-300F.

Works as advertised. Dont skimp. Get the Loctite brand!