Hi

what thread sealant for disc bolts

loctite 242 (for some reason rings a bell)

however from loctite site

221
Maximum thread size: Up to M12
Strength: Low
Breakaway torque M10 bolts: 8.5Nm
Fixture time steel: 25 min.
Fixture time brass: 20 min.
Fixture time stainless steel: 210 min.
Service temperature range: -55°C – +150°C

or

241
Maximum thread size: Up to M12
Strength: Medium
Breakaway torque M10 bolts: 11.5Nm
Fixture time steel: 35 min.
Fixture time brass: 12 min.
Fixture time stainless steel: 240 min.
Service temperature range: -55°C – +150°C

look better for small threads ?
ta

I use 243 when I can remember.

Never bothered, never lost a disc bolt.

243 – LOCK N SEAL

A dab of whatever thread lock I’ve got on hand and do it up by hand until it feels like it won’t budge further. It’s not much torque required. Or torque wrench, whatever it says on the disc.

Never had an issue with disc bolts, whether I’ve put stuff on the bolts or not.

Copper slip .

CheesybeanZ – Member
Copper slip

Hmm, not sure about that. It’s an anti-seize, not a thread lock. Idea is to make it easier to undo. Very high torques I’d use it on yes, e.g. I use it on lockrings and gxp bolts which are 40Nm+ torques. Thread lock at these torques makes little difference but might make it even more of a hassle to undo, whereas copper slip helps prevent them seize over time.

The 5 to 10Nm of a disc bolt just doesn’t need the stuff to make it easier to undo and surely more likely to rattle loose. Not tried, but doesn’t sound ideal to me.

As a heavy handed grabber of brakes I’ve never had a bolt come loose even after a couple of laps of Cannock’s finesh braking bumps .

It’s not necessary to use Loctite on disc bolts. Most bolts come with some blue locking compound on them anyway, and that’s quite sufficient plus it acts as an anti seize too.
For an absolute fact, I’ve seen (and drilled out) several seizure disc bolts in my time, but never seen a properly torqued bolt come loose. Nobody I know Loctites disc bolts in.