Re: sealing glue on dipping objective chipped off

Posted by Craig Brideau on
URL: http://confocal-microscopy-list.275.s1.nabble.com/sealing-glue-on-dipping-objective-chipped-off-tp7580641p7580649.html

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Dow Corning 3140 MIL-A- 46146 RTV Coating works well. It is a relatively
biocompatible sealing silicone. We use it for chambers and I have used it
to repair a chipped lens.

Craig
On 2013-07-08 9:53 AM, "Gabriel Lapointe" <[hidden email]>
wrote:

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>
> Hi Micheal,
> I don't have that objective, is the seal flexible or hard. If it has some
> flexibility or it feels rubbery I would go with a high quality bathroom or
> even better fish tank silicone. If it's hard I would go with epoxy. In any
> case, since i't far away from the lens I would try to do the repair myself
> to save so money.
>
> One note though, I don't know if there is a gap between the two part that
> need sealing. You might need to be careful to make sure any sealant you use
> doesn't get inside. Personally, I would flip the objective nose down as
> soon as the surface of the sealant stops being liquid. Epoxy solidify
> through a chemical reaction so in theory it's going to harden evenly.
> However, silicone harden outside-in, so the centre can stay liquid for
> quite some time after it looks solid. In this situation I would be afraid
> that some of it find it's way inside the lens tube.
>
>
> Good luck,
>
> *Gabriel Lapointe, M.Sc.*
> Lab Manager / Microscopy Specialist
> Concordia University, Biology Department
> 7141 Sherbrooke St. West SP 534
> Montréal QC H4B 1R6 Canada
> Lab : [phone] x5988
> Office : [phone] x3008
> Fax : [phone]
> Cell : [phone]
> [hidden email]
> cmac.concordia.ca
> http://gabriellapointe.ca
>
>
> 2013/7/8 Cammer, Michael <[hidden email]>
>
> > *****
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> > *****
> >
> > Leica added a sealing ring of glue to their 40X N.A. 0.80 water dipping
> > objective and some of it has chipped off.
> >
> > Picture at http://www.flickr.com/photos/mcammer/9240581316/
> >
> > We were thinking of sealing it with layers of Krazy glue (after covering
> > the lens element to protect from the vapor), high grade silicon caulk,
> or 5
> > minute epoxy.
> >
> > Anyone have experience with this, or should we have Leica fix it
> (probably
> > more expensive)?
> >
> > Thank you!!
> >
> > ________________________________________________________
> > Michael Cammer, Assistant Research Scientist
> > Microscopy Core, NYU Langone Medical Center & Skirball Institute of
> > Biomolecular Medicine
> > Cell: [phone]   Microscopy Lab: [phone]   Dustin Lab: (212)
> > 263-3208
> >
>