Re: Sail boat covers
I just recalled that the December 2011 issue of Practical Sailor had a five-page article -- Functional Fabrics: Sunbrella and WeatherMax face off in a long-term test. Both are recommended. The sewability of Sunbrella was rated higher that that of WeatherMax.
Briefly, Practical Sailor reviewed three marine fabrics:
Sunbrella (6001): $18.25 per yard / 10 year warranty; sew ability: excellent
Sunbrella Plus (8401): $23.40 per yard / 10 year warranty; sew ability: good
WeatherMax 80: $14.50 per yard / 5 year warranty; sew ability: fair
Half-dozen unnamed canvas shop “pros” were asked why Sunbrella was favored and reportedly “Handle-ability is a big consideration, and many find Sunbrella more user friendly. The material’s texture is sewing-machine friendly, and with an industrial walking foot or a conventional-feed machine, there’s no seam puckering or slippage.”
Tests included breaking strength, ability to shed water, pressure permeability, flogging and chafe testing.
Mechanical properties slightly favored WeatherMax.