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Harken Canvas

Viper 640 Bottom Cover

Harken Canvas Viper 640 Bottom Cover
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Our Part #: HAC8639 | Mfr. Part #: 8639
Free Shipping for US Continental orders over $99.

Boat: Viper 640
Canvas Fabric: Top Gun
Country of Origin: Made in USA

This durable, water-repellent sailboat cover features shockcord in the hem for a snug fit. Hook-and-loop closure to keel on starboard side also secures with 3 YKK buckles. 5 webbing straps with YKK buckles go over deck, plus 1 at transom gunwale secure cover. Mesh at transom for drainage.

Our Part # HAC8639 | Harken Canvas Part # 8639

Fabric Selection Guide to Harken Canvas Products



  • Vinyl-coated polyester with durable water repellent finish.
  • Affordable, lightweight fabric.
  • Good all-purpose fabric.
Top Gun:
  • Acrylic coated woven polyester fabric.
  • Tough, durable, and strong. Water repellent.
  • Durable travel and mooring cover.
  • Acrylic coated woven polyester with a soft non-woven backing.
  • Water resistant, soft and cushioning.
  • Good protective cover for race boats, wooden boats, and other delicate applications.
Sunbrella®/ Outdura:
  • 100% woven acrylic with fluorocarbon finish.
  • Breathable, highly weather resistant, long-lasting colors.
  • All purpose fabric for mooring covers, biminis, winch covers, etc.