I was taught at A&P mechanic school to use a cotton thread of a
certain size. Been so long ago I can't remember the size any more. But
the trick definitely works.

John Rodgers
On 8/28/2010 4:58 PM, Jim Arnott wrote:
> I suspect that Joann's would be a good place to
> start.  Ohterwise, you can make your own (Bob would...):
>
> http://blog.modernmechanix.com/category/how-to/page/8/
>
> Bob Hoover, rest his soul, wrote of this years ago.
> If you have The Sermons, look up "The Silk Thread Trick."
>
> Here's Bob's comment on a homebuilt forum:
> http://www.aviationkb.com/Uwe/Forum.aspx/homebuilt/3772/Engine-case-sealer
> About 3/4s of the way down.
>
> Short version:
>
> #3 Permatex ("Aviation")
> Just color the mating surface with it.
> Let sit for 5 minutes
> place 00 silk thread in the Permatex
> Double strand. One inside the bolt holes, one outside.
> Do not cross the strands.
> Bolt case together.
> Trim any extruded material.
> Let sit 24 hours before adding fluids.
>
> The thread crushes and becomes a gasket. (That's why
> SILK. Synthetics don't crush.)
>
> Jim
>
>