Date: Mon, 27 Jul 1998 19:16:03 -0600
From: Philip Wylie <pjwylie@planet.eon.net>
To: baidarka@lists.intelenet.net
Subject: Re: [baidarka] "Monster" coating for skin boats?
As I remember George Dyson's advice, hypalon was used to permeate
the substrate of the nylon skin and it was afterward the more viscous
neoprene was applied. In the context of applying Urethane (regardless
of component structure) I ask, would it not be better to proceed with
what works (to assure that the skin has been saturated through) and
then apply the choice of Urethane product?? Note, I am not taking
a position here but merely asking a question.
Thanks
Philip
Patrick Pierquet wrote:
> I don't remember the cost exactly; it was a bit more expensive than
> their "regular" 2-part urethanes, which sell for about $25 for a
> one-quart kit, about $70 for a 1-gallon kit(I have an older price list).
> "Toxicity" is relative....after reading the supplied MSDS sheet, I would
> use a face mask that has carbon filter cartridges IF I were working
> inside. Since I did my first experiment OUTSIDE, I simply aimed a fan
> at my work, and stayed upwind...no fumes, no problems, and so far as I
> can tell I'm still normal.(As an aside, even though I've already
> purchased a gallon of Hypalon, I think I'll use this stuff on the keel
> rubstrip.)
>
> - Patrick
>
> > -----Original Message-----
> > From: Craig O'Donnell [SMTP:dadadata@friend.ly.net]
> > Sent: Monday, July 27, 1998 2:00 PM
> > To: baidarka@lists.intelenet.net
> > Subject: Re: [baidarka] "Monster" coating for skin boats?
> >
> >
> > Ah. What cost the quart ket, and how toxic is this stuff?
> >
> > >described as "extra tough, abrasion resistant" urethane elastomers,
> > and
> > >they were originally developed for severe applications such as valves
> > >and seals, wear pads, heavy duty hose coverings etc. There's one
> > >product called "NF 1500-SP", that is formulated specifically to bond
> > >with nylon. Here are its stats, compared to Gaco Hypalon:
> > >
> > > Strength(psi) Hardness(Shore A) Elongation
> > >
> > >Hypalon 700 psi 78 to 83
> > 350%
> > >
> > >NF1500-SP 6,000 psi 88 560%
> > >
> > >Some pretty impressive statistics. One drawback I see is that the
> > >urethane products are 2-part, and once you mix the two parts, you
> > gotta
> > >use all of it, and use it fast.(Sort of like using epoxies, I guess)
> > I
> > >ordered a quart kit of this material, and applied it to samples of
> > >4-ounce heatshrink Dacron, and Dyson's 8-ounce nylon.
> >
> >
> > Craig O'Donnell
> > The Proa FAQ
> > <http://www.cyber-dyne.com/~jkohnen/proafaq.html>
> > The Cheap Pages
> > <http://www.friend.ly.net/user-homepages/d/dadadata/>
> > Sailing Canoes, Polytarp Sails, Bamboo, Chinese Junks,
> > American Proas, the Bolger Boat Honor Roll,
> > Plywood Boats, Bamboo Rafts, &c.
> > _________________________________
> >
> > -- Professor of Boatology
> > -- Junkomologist
> > -- Macintosh kinda guy
> > Friend of Wanda the Wonder Cat, 1991-1997.
> > _________________________________
> >