[aprssig] I'm gonna drill....

[Gerry Creager N5JXS]

Dow Corning used to make some non-corrosive sealants (DC-3140,DC-3144) 
that we used on circuit boards.  The SAREX gear PCBs were coated with 
the liquid version (I *think* 3144) and we used the tube-borne version 
on cables, connectors, etc.  I used to keep some around but it's been a 
bit since I saw it in my shop.

The non-acetic acid versions do take a bit longer to set up and dry than 
the scidic cure versions.

gerry

Dave Baxter wrote:
> Hi..
> 
> Yes, I think the "Low odour" stuff is if not totally non corrosive,
> somewhat less so than the "chip shop" (Acetic acid) smelling stuff....  
> 
> Silicone grease on the sealing "O" ring is also a good idea.  If you use
> both, keep the grease away from the sealant.  Don't thing there will be
> a nasty reaction, just that the sealant won't bond to a greasy surface..
> 
> Hope fitting it all goes/went well, and you now have a good reliable
> antenna on the car.
> 
> Dave G0WBX.
>  
> 
> 
>>-----Original Message-----
>>From: David Rush [mailto:yahoo at davidarush.com] 
>>Sent: Tuesday, May 09, 2006 5:40 PM
>>To: TAPR APRS Mailing List
>>Subject: Re: [aprssig] I'm gonna drill....
>>
>>Would "low odor" GE Silicone II "100% Silicone Sealant" 
>>qualify as non-corrosive?  Seems to have similar warnings 
>>about vapors as the regular (high odor?) stuff, although it's 
>>not in bold on the "low odor" 
>>package.  Both have warnings to remove contact lenses before 
>>using the stuff - that's the first time I've seen that one.
>>
>>I found a little tube of silicone grease at a local dive shop 
>>that I'll use on the o-ring under the nut, and probably 
>>slather on any place else that looks like it could use it.
>>
>>I've got the mount, the antenna, the hole saw (Antenex X-ACT), etc.  
>>Just need the time and decent weather now.
>>
>>David, ky7dr
> 
> 
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-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
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