Siliconing 130pds mirror to its cell?

[Craig a]

I’m thinking of doing this to my mirror on the 130pds and do away with the mirror clips that give the horrid dark spots on brighter stars, I don’t want to use a mask to surround the whole mirror making it slightly smaller in diameter, has anybody siliconed their primary to its cell before? And does it affect the mirror in any way? 
silicone is  pretty strong once cured, don’t get me wrong I wouldn’t do this on my big 10 inch mirror but the 130s mirror is only small and light 

[Marmot]

Hi

i have no experience of doing the job you mention, but if you are concerned that standard silicon (the normal bathroom sealant type) won’t be up to the job, then get one of the types specifically designed to bond. Eg Sikaflex or similar. They vary in the strength of bond they give. (The strongest Sikaflex is used to fix Solar panels to campervan roofs and is rated to keep them in place at 70mph plus!)

 

[Craig a]

Thanks for replying I will have a look at sikaflex 

 

[Craig a]

I was also looking at the silicone used for aquariums as it’s designed for glass and has no shrinkage when curing that normal silicone does of around 2% 

[Craig a]

Well I done it, used grip bond pro, used penny’s as spacers just waiting for it to cure, also awaiting a a mirror baffle from ts service to cover the very edge of the mirror further reducing flaring on brighter stars 

[Craig a]

Mirror baffle arrived yesterday and I installed it last night I also painted it Matt black 

[Marmot]

That looks like a job well done.