[Rhodes22-list] Robert on rebedding ports...

Tootle ekroposki at charter.net
Sat Mar 22 13:05:04 EDT 2008


Bob,

That was direct to the PDF, here is how I got there:

http://products3.3m.com/catalog/us/en001/auto_marine_aero/marine/node_GSWWSBSW85be/root_GST1T4S9TCgv/vroot_GS4JK4Y166ge/gvel_QH8HT14PGTgl/theme_us_marine_3_0/command_AbcPageHandler/output_html

Anyway, as you may be aware, Captain Rummy uses a product that he uses and
has experience with in roofing:  NP-1

It is a one part urethane.  I was reading the label on an old tube of 5200
and it said one part urethane.  It certainly is different from what Rummy's
product is.  5200 is glue, and gets very hard.  Boat makers use it
extensively to secure things.  The problem is its lack of flex on a boat. 
As fiberglass decks flex they cause cracks with 5200, that cause leaks.

I knew that 3M developed 4200 to deal with that issue.  So I tried to get
some technical answers as to differnces between:  5200, 4200, LifeSeal, and
NP-1.  I am not Roger P., so I am stuck with what is on the labels. 
Apparently all the mentioned products are Urethane mixtures of some type. 
For different purposes we need to use different products. 

And my brief study does not get into silcone, silcone II, neoprene, etc. 

Anyway, the page I posted is hard to get to on the 3M site.  You would think
that would direct you to it in oriniary English, but you have to try the
exact terms before you get to it.

I use Rummy's product.  It has remained flexible on seams for two years.  

Ed K
Greenville, SC, USA
http://www.nabble.com/file/p16224703/Eliot3.tif Eliot3.tif 
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