It's a primer especially made to apply before applying silicone RTV. I buy
it in the same shop I buy the RTV.

--
Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/

"Lauri Uusitalo" schreef in bericht
...
Jan van Gastel wrote:

It can be glued directly to the bars. Make the silicone blobs 2-3 mm
thick
and 10-12 mm. wide. For alumium you need to use a primer for better
bonding
of the silicone glue (I have experimented with that). Before applying
primer
or silicone, the metal has to be cleaned well, with acetone or
trychloorethyleen. If done well, there is absolutely no change the
mirror
will come loose.

Thank you for the answer. What are you using for the primer?

--
Lauri