Hi Rob,

From my recollections as an aircraft mechanic; Red: high temp.-high
strength.
Grey (or Gray) high performance. Black: high performance.

G.E. was the originator of RTV, here is a page with more than I thought
there was:
http://www.circuitspecialists.com/level.itml/icOid/7598

RTV= Room Temperature Vulcanization.

Dave

On 6/2/07, Rob <becida@comcast.net> wrote:
>
> RTV and other gasket 'stuff' comes in a variety of colors. I've used
> different colors for the same job with no noticeable problems. I seen
> people insist on a particular color for a particular job but when
> asked "why" the answer is often "that's what color I use".
>
> Any thoughts on the different colors?
>
>
>
> Rob
> becida@comcast.net
>