[Tigers] Crossed wires - Part II

[AAAGLASSS at aol.com]

Use neutral cure silicone it has no acid in it. Older Jags really had a  
problem with this. The GM cars had Urethane as a glue system it was just no 
rust  protection and lousy drainage.  
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In a message dated 11/3/2009 11:12:46 A.M. Pacific Standard Time,  
Theo.Smit at dynastream.com writes:

I used  gray Permatex gasket forming sealant on the marker lights. I
don't think it  is acid based. Other silicones that I've used release
acetic acid as they  cure, but I've never noticed any serious corrosion
on metal parts that I've  applied it  to.

Theo


________________________________

From: Randy Smith [mailto:RSSmithIQ at cs.com]
Sent:  November 3, 2009 10:17 AM
To: tigers at autox.team.net
Cc: Smit, Theo
Subject: Re: [Tigers] Crossed wires -  Part II


Some of you guys probably know much more  about this than I do,
but Theo mentioning using silicone sealant reminded  me about this.  Some
RTV silicone sealants can be quite acidic.   I used some to seal a
plastic cover to the aluminum case on my motorcycle  and it had a nasty
corrosive reaction with the aluminum in a relatively  short period of
time.  When I inquired, a very knowledgeable  motorcycle mechanic
explained that many RTV Silicone products are very  acidic.  That is why
the rear windows fell out (rusted out) of many of  the early 80's Chevys,
since they were an early application of the use of  silicone as a
sealant.  I believe the acid may be used as a catalyst  for curing the
RTV or something.  I also believe that there are  silicone sealants out
there that have a more neutral PH.  Anyone know  more about this?  I've
been trying to avoid RTV around any of my car  body parts because of my
previous bad experience.

-Randy



Randy Smith
INNER QUEST,  Inc.
34752 Charles Town Pike
Purcellville,  VA  20132
703-478-1078
540-668-6699
540-668-6253 fax

InnerQuestOnline.com <http://www.innerquestonline.com/>
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