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RE: M2 Fiberglass Boom preparation

David....the covering that this type boom has is called Gel coat....a resin 
based, usually colored, covering that is applied to the mold first to make 
it the resultant product somewhat shiny, resistant to UV and other 
degrading substances that might come in contact with the fiberglass 
itself.  However it too degrades over time and like other resin based 
products, should be covered either with paint or whatever to stop the 
deterioration over time....

73's.....Lonnie  (NT6B)

At 09:34 AM 11/11/01 -0800, David M. Tipton, PhD wrote:
>Hey folks, just for the record, this guy asked very specifically about the 
>M2 Fiber glass boom.  Not a 1.5 Inch piece of solid fiberglass.
>The M2 has some type of coating on it already.  Not sure what it is, but 
>it seems to allow the thing to hold up pretty well for multiple years 
>without degrading. (Or treatment.)
>At 02:43 PM 11/11/2001 +0000, Michael P. Olbrisch wrote:
>> > I have digested nearly 3 years of messages from this -BB,
>> > and every thread on this subject so far has recommended
>> > either taping, painting, sealing or wrapping these booms to
>> > prevent UV/IR degradation.  Am I missing something, or is a
>> > raw fiberglass boom more resistant to solar rays than other
>> > materials?   Anyone have any data from an untreated boom?
>>Roger that!!!  The sun here in West Texas will eat up that
>>boom in a matter of months.  I have found the best method
>>of protecting fiberglass out here is to use heat-shrink tubing.
>>It is available in 1.5 inch size...  the colored (not clear) protects
>>against UV damage...  it seals out moisture, stops abrasion
>>by the odd sandstorm (paint won't hold up)  and provides a better
>>grip for the antenna clamp to bite into.
>> > In the marine industry, fiberglass ALWAYS gets treated
>> > or sealed, else water intrusion ruins it.
>>Here in El Paso we don't have much problem with that.  It is
>>800 miles to the nearest ocean, so no salt-air.  Humidity is
>>very low... rarely above 50% and often below 10%.  And with
>>an annual rainfall of about 8 inches, it just isn't a worry.  What
>>I did to protect the ends against the infrequent rains was to
>>leave the H-S-T about 2 inches over the end of the boom,
>>fill the cavity with RTV, then shrink it over the end and wipe off
>>the excess RTV.  We did this 12 years ago to a fiberglass mast,
>>and just a few months ago it was removed for inspection.  It
>>was like new, and was re-covered on the end where the H-S-T
>>was cut off, and returned to service.
>>Within the constraints provided above, and discounting the odd
>>100+ MPH windstorm, I can see where a good fiberglass boom
>>could last a lifetime if properly protected.  I have see the remains
>>of an unprotected Shakespeare CB vertical cut to 10m.  In just
>>two years it was dangerous to handle without gloves.
>>Just my observations here, Y-all do what works for you.
>>Vy73,  Mike.   KD9KC    MARS: AAV6EV
>>My E-mail address: mailto:kd9kc@elp.rr.com
>>Ham Radio page: http://www.qsl.net/kd9kc/
>>Gun page: http://home.elp.rr.com/elpasochl/
>>Dog page: http://www.geocities.com/heartland/estates/4174
>>Freedom is expensive.  Those who are not willing to
>>pay the price ultimately lose everything.
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