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post #11 of 11 Old 05-16-2019
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Re: Sail durability

The durability of a sail is way more complex than just the issue of the thread.
Thread used to be cotton, which punked out and rotted away after a while. Then some folks switched to polyester and other synthetics, which either took UV damage or, if the thread got strong enough, the thread actually sawed the sailcloth, so now you had solid thread but the sail was ruined.

The compromise was "Dacot" thread, which is a dacron (polyester) core wrapped in cotton. The cotton wears or rots away, if you're watching you get it restitched before the remaining core can chew into the sail. If you see daylight through the stitching--that can be dacot thread with the wrapping already worn off.

Then there's Tenera and the newer high-tech fibers. Like anything else, you've got to pay for them, and sailmakers who are competing on price are simply not going to mention they exist.
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