Incidentally. I had already purchased purple Permatex Ceramic Extreme Brake Lubricant (236 ml - SKU #24126).

Before discovering the complaints about green attacking rubber bits, I applied this purple synthetic brake lubricant to a caliper slider pin and test-fit the pin in the Caliper Support bracket (no boot). There is NOTICEABLE sliding contact between the pin and the bracket.

I do not know what lubricant had been used when brake maintenance was performed before, but whatever it is, it enables the pins in the other Support bracket to slide SMOOTHLY in their bores - even now after a long period of service.

Searching for an alternative lubricant is what led me to the complaints about green Permatex. In addition to not providing lubrication "feel" that is compareable to the previous lubricant, my purple Permatex is also synthetic, just like the green Permatex.

 

i use dow corning high vacuum silicone grease. found it searching for o ring lube for my pool filter. works great for slider pins as well as many household uses. seems a little pricey but it's goes a long way.

 

Thank you for the tip. Do you happen to know whether the DOW product contains molybdenum (moly)? If you post the actual product name and SKU, I can search for Dow's product tech literature.

Edit: Found a Prod Info Sheet for it - https://www.duniway.com/images/_pg/datasheet-DC-150.pdf​

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"Service Temperature Range1°C (°F)-40 to 204 (-40 to 400)"​

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Hmmm: The upper end of this range is low, relative to values stated for products intended for use on brake components.​

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Edit: I am partly wrong.
Although low relative to brake lubricant containing ceramic [-50°F to +3000°F (-46°C to +1649°C)], the upper limit of the service range is similar to non-ceramic brake lubricants. SIL-GLYDE is 425°F. Permatex Ultra Disc Brake is 400°F.​

Perhaps the question above about Permatex's brake lubricants is better raised with the folks over at Bob Is The Oil Guy. I'll search the BITOG archives and start a thread if necessary, then report back.

Incidentally, I notice that SIL-GLYDE Brake Lubricant no longer appears on the AGS website. Instead AGS lists Cerami-Glyde Brake Lubricant in 4 gm, 4 oz and 8 oz pkgng.

Specialty Lube & Greases - AGS Company

agscompany.com

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Edit: I am wrong. SIL-GLYDE Brake Lubricant is still on the AGS site.​

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Sil-Glyde® Lubricant - AGS Company

agscompany.com

 

Perhaps the question above about Permatex's brake lubricants is better raised with the folks over at Bob Is The Oil Guy. I'll search the BITOG archives and start a thread if necessary, then report back.

+1

I look forward to seeing what the lube guys over there have to say.

Personally, I use syl-glide. I had another lube that I used interchangeably, but ran out and have forgotten the name of it, sorry. To be honest, each was just OK in practice. They were great for slide pins, but I wonder if something MUCH tackier would be better for the pad backing plates and ears/bracket.

 

Edit: I seriously question Subaru's choice of Phillips Multiplex Red as an alternate to Niglube. Multiplex is a mineral oil based grease and is not compatible with the EPDM rubber used in brake systems. Toyota red rubber grease is readily available alternate, unlike NiGlube and is a PAG (Polyalkylene glycol) based grease for use on brake caliper pins, pistons and associatde EPDM rubber components.

Dow silicone vacuum grease is a thick low vapor pressure silicone grease developed for use on rubber seals in vacuum systems (think aerospace vacuum tanks, not your household vacuum). It does not contain Moly. I use it occasionally on rubber parts just because I happen to have a leftover tube, otherwise I wouldn't bother with the extra expense. It's not intended as a metal-metal lube, but I expect it has some capability. Dow just doesn't advertise it.

Rather than use a one-size-fits-all lube, you might consider a Subaru approved alternate to the spec'd Niglube RX-2 for use on the caliper pins. It's a lithium complex extreme pressure grease from Phillips 66 called Multiplex Red #2 (Renamed Mutiplex 220 #2 a couple years ago.)

You'll find the Niglube referred to as "rubber grease" in some of the literature due to it's compatibility with the seals. The same goes for the Phillips product. The load bearing capability and anti-gall properties are superior to silicone products. Going from memory on that part as I can't find the chart.

Whatever you use, it's good practice to clean all old grease from whatever you're lubing prior to using a different grease to avoid compatibility issues.

 

I use Molykote brake caliper pin lubricant that is made specifically for those pins. I also have NigLube. These lubricants do not dry out over time and make function of the calipers perfectly smooth.

 

I should have warned you - they just changed their forum format. I had to change my password. Maybe older members who haven't logged in for a long time just got booted.

 

I should have warned you ..

No worries, I'm back in at BITOG now.

Clearly no need for me to create a thread there about Permatex Brake Caliper Lubricants, this topic has already been addressed numerous times beginning 2017 or earlier. A couple more threads

Switched from Permatex Purple to Mission Silicone

I hadn't even used the Permatex Purple for two weeks and my front brakes were seizing up. Coming to a stop, the car would violently pull to a side. This is a Lexus IS350c with the monobloc calipers and the single slide pin is pretty much 100% exposed to the elements, and water+brake dust like to...

www.bobistheoilguy.com

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Permatex Ceramic Brake Parts Lubricant

I just thought I would share my experience yesterday as a result of this product. I was driving my wife's Rav4 and noticed the front brakes were making a grinding/groaning noise. I had done the front and rear pads and rotors using new Power Stop ceramics and Wagner Thermoquiet rotors. about...

www.bobistheoilguy.com

I now have in hand an 8 Oz tube of SIL-GLYDE Brake Lubricant for use on my FXT slider pins.

Since I already used a small amount of the expensive purple Permatex Ceramic Extreme Brake Lubricant, I doubt I will be successful in returning it. So I intend to apply purple Permatex on the leftover used slider boots and damper sleeve, then set these parts aside to see what takes place over time.

 

I use 3M Silicon Paste for the pins, and very thin coat of Molykote M77 for the brake pad ears. Some people recommend not using any anti seize for the ears at all.