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<DIV><FONT size=4>Mike,</FONT></DIV>
<DIV><FONT size=4>Gray's answer is coming from an expert, I'd listen to what he
says. The point I was trying to make and didn't make so well is that epoxy mixed
with cabosil has virtually no structural strength as compared to glass cloth
impregnated with epoxy or epoxy mixed with milled fiber. As such, it would
probably be prone to stress cracks if you relied on it in a high stress and/or
high-flex area. </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>I'd use microballoons for any filling task I intended to sand
and paint. Cabosil does a much better job of thickening epoxy and turning it
thixotropic (sp?) which means non-runny. It also tends to be a much lighter mix
than microballoons but is very tuff to build. </FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>If I were installing a firewall that had some gaps here and
there where the edges butt up to the glass fuse, I'd use cabosil, especially
since it's all internal. If I wanted to make a stab filet on the outside of the
fuse that was going to be sanded and painted, I'd go with microballoons. Hope
this provides a little more clarity.</FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>Verne</FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=MBaiano2@HCSUS.JNJ.com href="mailto:MBaiano2@HCSUS.JNJ.com">Baiano,
Mike [HCS]</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:'discussion@nsrca.org'">'discussion@nsrca.org'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, September 06, 2002 11:08
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: What is CABOSIL ??</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=268512915-06092002><FONT face=Arial color=#0000ff size=2>HI
Verne,</FONT></SPAN></DIV>
<DIV><SPAN class=268512915-06092002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=268512915-06092002><FONT face=Arial color=#0000ff size=2>So
does micro-balloon expoxy mixtures have any structural strength? I have both
micro-balloons and cabosil - and I'm never quite sure when I should use one as
opposed to the other. I generally reserve the cabosil when I just want to
thicken epoxy into a paste, and weight isn't a huge issue. How do you decide
which one to use for a particular application?</FONT></SPAN></DIV>
<DIV><SPAN class=268512915-06092002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=268512915-06092002><FONT face=Arial color=#0000ff
size=2>Thanks,</FONT></SPAN></DIV>
<DIV><SPAN class=268512915-06092002><FONT face=Arial color=#0000ff
size=2>Mike</FONT></SPAN></DIV>
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<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Verne Koester
[mailto:verne@twmi.rr.com] <BR><B>Sent:</B> Thursday, September 05, 2002
11:41 PM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> Re: What is
CABOSIL ??<BR><BR></FONT></DIV>
<DIV><FONT size=4>Cabosil is fumed silica sand. It's extremely light weight.
When mixed with epoxy finishing resin, it creates a paste that won't run on
vertical surfaces. It's also frequently mixed with epoxy in a thinner mix
and brushed into a mold to create the external gel coat on a glass part
which prevents pinholes from making it to the surface of a part. On a clear
epoxy-cloth piece, the epoxy/cabosil mix can be seen in all the 90-degree
corners to bridge the radius the cloth can't make. It'll show as an opaque
white as opposed to the clear epoxy/cloth you see everywhere else. Down side
is that it's much tougher to sand than micro-balloons and has virtually no
structural strength. Good stuff to have around, though. I use it a
lot.</FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4>Verne</FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=extra330@tampabay.rr.com
href="mailto:extra330@tampabay.rr.com">Van - E-Mail LIST</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">Pattern LIST</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, September 05, 2002
8:32 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> What is CABOSIL ??</DIV>
<DIV><BR></DIV>
<DIV><FONT size=2>Don't think I know what this is ?</FONT></DIV>
<DIV><FONT
size=2>________________________________________________</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Van Flowers<BR>AMA: 6216 IMAC: 2229 <BR>IMAA: 26019
NSRCA: 2778<BR><A
href="http://www.rc-aerobatics.com">www.rc-aerobatics.com</A></FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV> </DIV>
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