I find a pasty cratch to be a sign of poor maintenance.

Just in case you were looking for an answer here's Warren's version.

"Yes, you were supposed to coat the cylinder walls of the caliper, the piston, and rectangular seal with silicone grease! Leave it there, and you will be happy when you disassemble the caliper next time ...

Ate has recommended the use of silicone grease when rebuilding calipers, wheel, and master cylinders for more than three decades! They included a small 1 cc tube in rebuild kits for the 911 master cylinder back in the '70s and '80s.

Dow Corning 4, 4X, 111, and 112 are all suitable for use in rebuilding calipers ... it is inert, doesn't react with glycol brake fluids, lubricates metal and rubber seals and cups, protects bare metal parts from moisture, and it doesn't go anywhere!

McMaster-Carr

A 5.3 oz tube will last for decades used in a home shop setting ... it is the best $10.82 you will ever spend on your brakes!!!"
__________________
Warren Hall, Jr.

1973 911S Targa ... 'Annie'
1968 340S Barracuda ... 'Rolling Thunder'
Last edited by Early_S_Man; 03-15-2007 at 09:27 AM..

Wow. Cool to read words from the late master himself. Immortality lives!

Coconut oil...its life changing ;)

I buy dow corning 111 grease by the case for my shop.
Best stuff there is for o-rings and such.

You still hyping that trendy crap?

ATE brake grease is what I use on my brakes. Its not pasty, its more like a heavy grease. And it does not come in cherry flavor.