From: http://www.northsails.co.uk/media/articles/sailcare.htm



MYLAR

Sails made of Mylar film laminated to a polyester substrate provide good strength for their weight, but they are also relatively
fragile, so it's wise to:

1.. Never exceed your sail's recommended wind range;
2.. Never use a genoa that doesn't have spreader patches;
3.. Don't flog the sail unnecessarily;
4.. Don't overstretch the luff of a Mylar sail. Mylar sails need only a bit of luff tension to position the draft correctly.
Therefore, tension the halyard and Cunningham only enough to remove horizontal wrinkles from the luff. Mark the genoa halyard so you
don't over-tension it when coming into the leeward mark.
There are other precautions you should take with Mylar sails. Don't let any solvents (such as diesel fuel or cleaning agents) get on
them, because these will dissolve the glue and cause separation. Mylar film is sensitive to heat, so be sure not to let your sail
touch any part of the engine or even rest against an interior.



S.Simon

"SAIL LOCO" wrote in message ...
How the hell does a cruising sailor store a Mylar sail
on the boom without causing damage?

Not true. Hell, I know people who flake Kevlar mains on the boom.
S/V Express 30 "Ringmaster"
Trains are a winter sport