Loctite LB 8012 vs. Molykote M77 for Brake Grease

The Critic

The Critic

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Let's say I want a high solids grease for brake pad shims and contact points. Rubber/plastics compatibility isn't an issue.

Both products contain a high percentage of moly. The M77 product is silicone based but Loctite is not. But for the application, I don't think it matters.

Seems like Loctite would be a much better value. Thoughts?

Loctite LB 8012:
PDS: http://tds.henkel.com/tds5/Studio/ShowPDF/243 NEW-EN?pid=LB 8012&format=MTR&subformat=REAC&language=EN&plant=WERCS
SDS: https://img0.fastenal.com/infp360pmm/medias/docus/384/0150931_sds_eng.pdf

Molykote M77:
PDS: https://www.dupont.com/content/dam/dupont/amer/us/en/Molykote/public/documents/en/MOLYKOTE M-77 Paste 71-0186G-01.pdf
SDS: https://www.chempoint.com/en-mx/products/download?grade=51966&doctype=sds
 
None of those are particularly high temperature rated and the last thing you want is grease to run onto the rotor. Why not use something specifically made for brakes like

61428KItHeL._AC_SL1200_.jpg
 
atikovi said:
None of those are particularly high temperature rated and the last thing you want is grease to run onto the rotor. Why not use something specifically made for brakes like
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It's my opinion (I read this somewhere) that the 3000 degreeF rating of products that contain moly or ceramic is somewhat of a misnomer. The soap base and oil content (silicone, pao, etc.) still are only good up to about 500 +/- degree F. It's the leftover moly or ceramic content that can tolerate the 2500 + degrees F.

Critic, what is the soap base/lubricating oil in the Loctite product? My test of either product would be how well they resist water absorption with a dab on your palm held under the faucet (mixing it together). I use a product called Pastelub, but my most recent tub purchase contained a different grease than previously. I'm going to follow up with the company some day. https://goodson.com/products/bpl-2400-pastelub-brake-lubricant
 
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doitmyself said:
Critic, what is the soap base/lubricating oil in the Loctite product?
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Some type of synthetic oil, probably no different than the carrier oil found in Permatex Purple, Copper anti-seize, etc.

1657323939577.png


atikovi said:
None of those are particularly high temperature rated and the last thing you want is grease to run onto the rotor. Why not use something specifically made for brakes like
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That product doesn't contain enough solids for noise dampening. The M77 product is fine up to 446F, how hot do you need?
 
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And your Loctite product says its good up to 750 F. It looks to have potential, if it turns out to be severely hydrophobic.

I would wager that the non ceramic components of atikovi's suggestion is not any more heat tolerant than these others.
 
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atikovi said:
The shims are supposed to stop noise. If not, the calipers or carriers are worn, allowing the pads to move around. No amount of grease will stop that.
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Shims don’t always stop noise. Noise can also be cause by incorrect rotor metallurgy for the application, pad formula, rotor hat rigidity, etc.
 
I agree that water resistance is a concern, LB 8012 makes no mention about it in any of its literature, both Molykote M-77, and Molykote AS-880N which was specifically formulated as a brake shim grease, have water resistance as a feature.

Temperature wise I think it's fine, AS-880N has a lower upper service temperature, and really your typical floating caliper on daily driven passenger vehicle just doesn't get as hot as some lubricant marketing would have you believe. If you're not melting SEA J1570 caliper piston boots (120 C) or boiling wet DOT 3 (140 C), then you really don't need anything with a higher service temperature than the +204 C of AS-880N.

And although you pointed out that compatibility isn't an issue here, personally I'm reluctant to recommend anything with a petroleum base for use on any part of a brake system. The consequences and potential resulting liability from the inevitable misuse are just too high, I imagine many of the aftermarket folks feel the same.
 
The Critic said:
Let's say I want a high solids grease for brake pad shims and contact points. Rubber/plastics compatibility isn't an issue.

Both products contain a high percentage of moly. The M77 product is silicone based but Loctite is not. But for the application, I don't think it matters.

Seems like Loctite would be a much better value. Thoughts?

Loctite LB 8012:
PDS: http://tds.henkel.com/tds5/Studio/ShowPDF/243 NEW-EN?pid=LB 8012&format=MTR&subformat=REAC&language=EN&plant=WERCS
SDS: https://img0.fastenal.com/infp360pmm/medias/docus/384/0150931_sds_eng.pdf

Molykote M77:
PDS: https://www.dupont.com/content/dam/dupont/amer/us/en/Molykote/public/documents/en/MOLYKOTE M-77 Paste 71-0186G-01.pdf
SDS: https://www.chempoint.com/en-mx/products/download?grade=51966&doctype=sds
Click to expand...
Hard to perceive value when no pricing is given. Personally I think I’d want the M-77 for water resistance and boot/seal compatibility.

I use that loctite product for stressed threaded assemblies. It’s good stuff. But personally I’d want silicone for the brakes.
 
Honda sells the M-77 Molykote as genuine Honda Spare part for servicing brakes. It works well. It is a very "dry" grease.
When it´s get to hot, the grease evaporates and leaves the solid MOS 2 in place. I use it on my Honda S2000, it works.

Quote from the Molykote M77 PDS form the first posting here:

"Applications
Suitable for lubrication points with low to moderate loads and low
speeds that are subjected to water and extreme temperatures; at
temperatures above 230°C (446°F), the carrier volatilizes leaving
virtually no residue, and the remaining dry sliding film itself takes
over the lubrication up to +400°C (+662°F). Suitable for lubricating
parts consisting of materials that are not resistant to mineral oils.
Used successfully on metal/metal combinations with frictional and
contact surfaces, brake anchor plates and the brake pistons of
disc brakes."

The Loctite PDS reads similar, but it did not mention brakes. Therefore, i would choose the M77.
 
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