Which Loctite?

[Mike W1]

Never had the problem with any of my other Lyman moulds but my 9mm mould has one of the handle screws that go into the mould loosening periodically. Kind of a pain to keep snugging it up.

Tried some Blue on it but suspect I need one of the grades that withstands heat better. Any suggestions?

[kenjuudo]

Give teflon pipe sealing tape a try, stretch it tight.

[BPShooter]

I agree with Kenjuudo. Try to find the yellow tape it's for high temp, we use it on brass fittings in Zinc die cast molds.

[ph4570]

The highest temp loctite (that I know of) is rated for 450 degrees F. #272 and #266.

[dragon813gt]

Teflon tapes are only rated up to 500 degrees. This is a property of Teflon as its stable up to that point. Above that it starts to degrade which is not healthy for you. Just look up Teflon Flu if you don't know about it. Considering molds seem to run well around 450 that's to close for comfort for me. The higher temp tapes are for antiseize and lubrication. Not for locking it all down. We use a nickel bearing antiseize made by Loctite for burner bolts in boilers. They see temps in excess of 1000 degrees and they stay put. Might be worth a shot.

[seaboltm]

Teflon tapes are only rated up to 500 degrees. This is a property of Teflon as its stable up to that point. Above that it starts to degrade which is not healthy for you. Just look up Teflon Flu if you don't know about it. Considering molds seem to run well around 450 that's to close for comfort for me. The higher temp tapes are for antiseize and lubrication. Not for locking it all down. We use a nickel bearing antiseize made by Loctite for burner bolts in boilers. They see temps in excess of 1000 degrees and they stay put. Might be worth a shot.

Not familiar with the product, but it sounds viable. There is NO locktite product that will withstand casting temperatures. In fact, the prescribed way to release red locktite is to apply heat . . . .

[dbosman]

I'd be looking for a new screw or a high temp epoxy.

[MTtimberline]

Might be a little extreme, but if the chemical thread lockers fail, you could always cross drill and tap a hole for a very small headless Allen set screw. Something like a #4-40 or #6-32?

[Mike W1]

Looks like the first thing to try is another bolt and epoxy. Hadn't thought about epoxy. Will see what happens I guess. Thanks for the feedback of ideas.

[country gent]

Try a small lock washer under the head of the screw.

[GabbyM]

Looks like the first thing to try is another bolt and epoxy. Hadn't thought about epoxy. Will see what happens I guess. Thanks for the feedback of ideas.

Any epoxy I ever worked with will melt at very low temps. Hair dryer or heat gun temps. Way you remove a bench rest gun from it's epoxy bedding is clamp barrel in vise then run heat gun on action. Stock drops right off in under a minute.

High temp silicon gasket in a tube may hold up.

New screws from hardware store may fix your problems. Especially if you could find a lock washer as country gent suggest.

[Shooter6br]

Copper wire ?

[w5pv]

a star lock washer fixed my problem.

[Mike W1]

a star lock washer fixed my problem.

I didn't have one in my assortment so tried a split type. Better but not quite success. Good hardware 25 miles away so next trip over I'll see if they have some.