Message-Id: <3.0.5.32.19980727211741.007ae920@sowega.net>
Date: Mon, 27 Jul 1998 21:17:41 -0400
To: baidarka@lists.intelenet.net
From: Wynne Eden <graymare@sowega.net>
Subject: Re:[baidarka] "Monster" coating for skin boats?
In-Reply-To: <FFF3F7BA6450D111BF2C0000BC11406271E397@ROMULUS>
Please compare the prices. I worry about that too...I work for a
non-profit organization.
Wynne
Americus, GA
At 09:51 AM 7/27/98 -0500, you wrote:
>I just wanted to pass along some information about a family of 2-part
>urethane coatings, that look like they'd be excellent for kayak
>coatings. The material is made by a company called Cal
>Polymers(562-436-7372; 2115 Gaylor St., Long Beach, CA 90813) They're
>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. It seemed to work
>well, although it did not penetrate the material very well(formed more
>of a surface coat). I used it at a temperature of about 75 F, and it
>"set" in about half an hour. Even though it's not fully cured, it's
>EXTREMELY tough and flexible. I may use it, or one of the other Cal
>Polymer urethanes, on my next boat.
>
>