Dave Liquorice wrote:
On Wed, 21 Jul 2004 20:06:52 +0100, The Natural Philosopher wrote:

Maybe, but silicone is your friend. It make custom fitted gaskets to
anything.

Trouble is guttering needs to move to take up expansion/contraction
due to temperature changes. Wouldn't silicone prevent that movement?

We aren't talking little movements either but an 1" or so over a 3M
length of guttering.

If you grease one side, then the silicone sets but does not adhere to
that side.