Amazon.com: All Purpose Extra Strong Heavy Duty Bonded Black Sewing Thread Great for Quilting,Upholstery, Leather, Denim, Marine, Outdoor and Camping Products. T70#69 210D/3PLY 1400 Yards. : Arts, Crafts & Sewing
Amazon.com: EZ-Xtend #138 Bonded Polyester Thread 100% American Made for Outdoor and Marine Fabric Sewing Applications, Awnings, Tarps, Canvas. for Heavy Duty and Industrial Sewing Machines (White, 8 oz)
Marine Thread is the Glue of Boat Canvas. Be Sure You Know the Basics.