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#3360612 - 05/03/14 11:16 AM Re: THREE Permatex brake lubricants [Re: sws669]
Blaze Offline


Registered: 12/31/10
Posts: 942
Loc: Washington State (East)
I just replaced the pads on one of our farm trucks (1993 Ford F-350) and it doesn't use sliding caliper pin/boot system. No grease or rubber boots etc to mess with. It takes longer just to remove the tire to do a pad replacement job. All you do is knock out two pins, remove the caliper, throw the pads on, mount caliber and knock the two pins back in and done.

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#3392389 - 06/08/14 06:07 PM Re: THREE Permatex brake lubricants [Re: sws669]
HosteenJorje Offline


Registered: 05/26/14
Posts: 199
Loc: Columbus,Nebraska
That green Permatex [censored] swelled the lower slide pin bushings so bad I had a hard time getting the pin out. No Permatex brake grease of any color for me. I am sticking wil Syl-Glyde or may use the new CRC brake grease.

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#3507670 - 10/10/14 09:01 PM Re: THREE Permatex brake lubricants [Re: sws669]
another Todd Offline


Registered: 05/15/06
Posts: 1668
Loc: Southern CA
I always thought syl-glyde would dry out under heat. Is that wrong? Are you guys getting good service life out of it in disc brake applications? Do you also use it under shoes on the backing plate? Adjuster screws?
_________________________
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#3508020 - 10/11/14 10:38 AM Re: THREE Permatex brake lubricants [Re: another Todd]
doitmyself Offline


Registered: 06/03/02
Posts: 4740
Loc: MI
It could be used as you suggest, another Todd. But, as mentioned above, a lot of people like to use two different greases: a brake "grease" for the enclosed slide pins and a high solids "paste" for the exposed metal to metal parts. IMO, the benefit of the pastes recommended above is that they are more tenacious and more water resistant. With the high solids paste, as (if) the oil component eventually dissipates away, you are still left with some boundary lubrication in the form moly/graphite/ceramic,etc. "marbles" to still provide some lubrication.

Just my opinion, and this guy's also: http://www.aa1car.com/library/2005/ic80560.htm


Regarding Permatex green, I also had negative results similar to those mentioned above.

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#3508250 - 10/11/14 04:16 PM Re: THREE Permatex brake lubricants [Re: sws669]
wokeupdead Online   content


Registered: 09/11/14
Posts: 24
Loc: WV
I use the CRC synthetic brake lube on the backing plates and pad abutment ends of the pads. Syl-glide or dielectric grease ONLY on the guide pins/bolts due to rubber damage. Regular grease will seize the pins.

I have also found anti-seize will turn very hard and dry and cause pins to stick.
_________________________
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#3511827 - 10/15/14 08:54 AM Re: THREE Permatex brake lubricants [Re: HosteenJorje]
rkpatt Offline


Registered: 10/27/02
Posts: 133
Loc: SE
Isn't Permatex dielectric tune-up grease the equivalent to Syl-Glyde ?

Originally Posted By: HosteenJorje
That green Permatex [censored] swelled the lower slide pin bushings so bad I had a hard time getting the pin out. No Permatex brake grease of any color for me. I am sticking wil Syl-Glyde or may use the new CRC brake grease.

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#3512781 - 10/16/14 10:52 AM Re: THREE Permatex brake lubricants [Re: rkpatt]
doitmyself Offline


Registered: 06/03/02
Posts: 4740
Loc: MI
Originally Posted By: rkpatt
Isn't Permatex dielectric tune-up grease the equivalent to Syl-Glyde ?

Originally Posted By: HosteenJorje
That green Permatex [censored] swelled the lower slide pin bushings so bad I had a hard time getting the pin out. No Permatex brake grease of any color for me. I am sticking wil Syl-Glyde or may use the new CRC brake grease.


NO!!!

The Permatex green is a PAO grease. Dielectric and other silicone brake grease (i.e. Dow)are true silcone based grease.

Sil-glyde seems to be a grease of different nature than most realize. It's MSDS indicates it contains only a small percentage of silicone (< 13%) and in fact the SIL might actually refer more to silicate, in my opinion. It also has castor oil and polyethylene glycol as main components.

https://www.imperialsupplies.com/msds0075150.shtml

Chemical/Ingredient Name |CAS-No |Weight%
| |
Polypropylene glycol |25322-69-4 |30-60%
Dimethyl silicone polymer|67762-90-7 |7-13%
with silica
Oleoyl Sarcosine Mixture ||0.1-1% |
Diethyl phthalate |84-66-2 |0.1-1%
Glycine, |110-25-8 |0.1-1%
N-methyl-N-(1-oxo-9-octadecenyl)-, (Z)- Phenyl-1-naphthylamine 0.1-1%

While Sil-glyde's claim of being silicone based is stretching the truth, it is a time tested excellent brake grease with a huge following.

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#3513747 - 10/17/14 12:16 PM Re: THREE Permatex brake lubricants [Re: doitmyself]
gogozy Offline


Registered: 03/16/04
Posts: 666
Loc: GTA, Ontario, Canada
Originally Posted By: doitmyself
Originally Posted By: rkpatt
Isn't Permatex dielectric tune-up grease the equivalent to Syl-Glyde ?

Originally Posted By: HosteenJorje
That green Permatex [censored] swelled the lower slide pin bushings so bad I had a hard time getting the pin out. No Permatex brake grease of any color for me. I am sticking wil Syl-Glyde or may use the new CRC brake grease.


NO!!!

The Permatex green is a PAO grease. Dielectric and other silicone brake grease (i.e. Dow)are true silcone based grease.

Sil-glyde seems to be a grease of different nature than most realize. It's MSDS indicates it contains only a small percentage of silicone (< 13%) and in fact the SIL might actually refer more to silicate, in my opinion. It also has castor oil and polyethylene glycol as main components.

https://www.imperialsupplies.com/msds0075150.shtml

Chemical/Ingredient Name |CAS-No |Weight%
| |
Polypropylene glycol |25322-69-4 |30-60%
Dimethyl silicone polymer|67762-90-7 |7-13%
with silica
Oleoyl Sarcosine Mixture ||0.1-1% |
Diethyl phthalate |84-66-2 |0.1-1%
Glycine, |110-25-8 |0.1-1%
N-methyl-N-(1-oxo-9-octadecenyl)-, (Z)- Phenyl-1-naphthylamine 0.1-1%

While Sil-glyde's claim of being silicone based is stretching the truth, it is a time tested excellent brake grease with a huge following.

thx doitmyself,
the PAO in the green thing often swell the robber boots?

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#3513773 - 10/17/14 12:51 PM Re: THREE Permatex brake lubricants [Re: gogozy]
doitmyself Offline


Registered: 06/03/02
Posts: 4740
Loc: MI
Originally Posted By: gogozy
thx doitmyself, the PAO in the green thing often swell the robber boots?


I'm not an expert on brakes or grease. I'm also not a chemist. I do know that certain car brands have rubber brake components that seem more sensitive to swelling per my Google searches.

The PAO brake greases such as Permatex, CRC/Stalube, etc. all advertise they are plastic and rubber safe. Yet, if you look at the elastomer compatability chart at the bottom of the following link, you can easily see that silicone is safe with all elastomers listed(except silicone) while the PAO has several that are not compatable (buna-s, EPDM, others).

http://www.nyelubricants.com/_pdf/literature/engineering_pdf/Engineering_Ref_Charts.pdf

Again, I'm just making my decisions for myself based on internet research.

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#3514970 - 10/19/14 06:54 AM Re: THREE Permatex brake lubricants [Re: doitmyself]
wokeupdead Online   content


Registered: 09/11/14
Posts: 24
Loc: WV
Originally Posted By: doitmyself
Originally Posted By: gogozy
thx doitmyself, the PAO in the green thing often swell the robber boots?


I'm not an expert on brakes or grease. I'm also not a chemist. I do know that certain car brands have rubber brake components that seem more sensitive to swelling per my Google searches.

The PAO brake greases such as Permatex, CRC/Stalube, etc. all advertise they are plastic and rubber safe. Yet, if you look at the elastomer compatability chart at the bottom of the following link, you can easily see that silicone is safe with all elastomers listed(except silicone) while the PAO has several that are not compatable (buna-s, EPDM, others).

http://www.nyelubricants.com/_pdf/literature/engineering_pdf/Engineering_Ref_Charts.pdf

Again, I'm just making my decisions for myself based on internet research.


Doitmyself is correct. silglyde not identical to dielectric grease but proves to be excellent in brake boot applications.

The other brake greases will swell most rubber seals/boots. I prefer to use dielectric grease for the boots, but shop buys silglyde.
_________________________
ASE Master, L1 Certified

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#3518134 - Today at 03:07 PM Re: THREE Permatex brake lubricants [Re: wokeupdead]
gogozy Offline


Registered: 03/16/04
Posts: 666
Loc: GTA, Ontario, Canada
Originally Posted By: wokeupdead
Originally Posted By: doitmyself
Originally Posted By: gogozy
thx doitmyself, the PAO in the green thing often swell the robber boots?


I'm not an expert on brakes or grease. I'm also not a chemist. I do know that certain car brands have rubber brake components that seem more sensitive to swelling per my Google searches.

The PAO brake greases such as Permatex, CRC/Stalube, etc. all advertise they are plastic and rubber safe. Yet, if you look at the elastomer compatability chart at the bottom of the following link, you can easily see that silicone is safe with all elastomers listed(except silicone) while the PAO has several that are not compatable (buna-s, EPDM, others).

http://www.nyelubricants.com/_pdf/literature/engineering_pdf/Engineering_Ref_Charts.pdf

Again, I'm just making my decisions for myself based on internet research.


Doitmyself is correct. silglyde not identical to dielectric grease but proves to be excellent in brake boot applications.

The other brake greases will swell most rubber seals/boots. I prefer to use dielectric grease for the boots, but shop buys silglyde.


thanks! i have a spare tub of green grease but i don't use it anymore after learning from BITOG about silglyse.
thx to doitmyself for the chart, the chart has good info. i think I remember there were some debate long ago that how group 4 oil (PAO?) will harden seal and need a bit of other oil to condition the seal.

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