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Shockcord & Polypropylene

Shockcord & Floating Polypropylene Line 

Shockcord, or bungee, is used on small sailboats to secure daggerboards, centerboards, hiking straps, and more. This stretchy line is useful anywhere you need give in an attachment point. Polypropylene is a floating line commonly used as a bow line on small boats such as Optimists and Lasers.


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  • 6mm Robline Dyneema Shockcord Black

    6mm Robline Dyneema Shockcord Black

    Robline
    $1.30
    High Tech Shockcord with Abrasion Resistant Cover Robline Dyneema Shockcord features a high-tech Robtec cover with a special braiding technique covers strands of natural Rubber as its core. One can expect an elongation of 100% (becomes twice as long)...
    Qty in Cart: 0
    Price:
    $1.30
    Subtotal:
  • 5mm Robline Dyneema Shockcord Black

    5mm Robline Dyneema Shockcord Black

    Robline
    $1.20
    High Tech Shockcord with Abrasion Resistant Cover Robline Dyneema Shockcord features a high-tech Robtec cover with a special braiding technique covers strands of natural Rubber as its core. One can expect an elongation of 100% (becomes twice as long)...
    Qty in Cart: 0
    Price:
    $1.20
    Subtotal:
  • 4mm Robline Dyneema Shockcord Black

    4mm Robline Dyneema Shockcord Black

    Robline
    $1.09
    High Tech Shockcord with Abrasion Resistant Cover Robline Dyneema Shockcord features a high-tech Robtec cover with a special braiding technique covers strands of natural Rubber as its core. One can expect an elongation of 100% (becomes twice as long)...
    Qty in Cart: 0
    Price:
    $1.09
    Subtotal:
  • 3mm Robline Dyneema Shockcord Black

    3mm Robline Dyneema Shockcord Black

    Robline
    $0.74
    High Tech Shockcord with Abrasion Resistant Cover Robline Dyneema Shockcord features a high-tech Robtec cover with a special braiding technique covers strands of natural Rubber as its core. One can expect an elongation of 100% (becomes twice as long)...
    Qty in Cart: 0
    Price:
    $0.74
    Subtotal:
  • 8mm Robline Shockcord Black

    8mm Robline Shockcord Black

    Robline
    $0.87
    Trust Robline Shock Cord for quality and performance. The cover is made of highly abrasion-resistant Polyester, while its core consists of high-quality rubber. This combination makes the rope compact, stable, and durable. Diameter - 8mm Core...
    Qty in Cart: 0
    Price:
    $0.87
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  • 6mm Kingfisher Float Line

    6mm Kingfisher Float Line

    Kingfisher Yacht Ropes
    $0.40
    Float Line from Kingfisher is the ideal floating bowline material. The braided multi-filament Polypropylene rope with no core is made from bright colors for high visibility, floats and is an ideal safety rope. 16 Plaint construction Multi-filament...
    Qty in Cart: 0
    Price:
    $0.40
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  • 3mm Shockcord Black

    3mm Shockcord

    Novabraid
    $0.16
    Shockcord (sometimes called bungee) is a stretchy line used in a variety of sailboat applications including inhauls, daggerboard retainer, or as a tensioner for hiking strap lines. This premium 3mm shock cord offer superior protection against abrasion...
    Qty in Cart: 0
    Price:
    $0.16
    Subtotal:
  • 5mm Shockcord

    5mm Shockcord

    Novabraid
    $0.36
    Shockcord (sometimes called bungee) is a stretchy line used in a variety of sailboat applications including inhauls, daggerboard retainer, or as a tensioner for hiking strap lines. This premium 5mm shock cord offer superior protection against abrasion...
    Qty in Cart: 0
    Price:
    $0.36
    Subtotal:
  • 8mm Polypropylene Line

    8mm Polypropylene Line

    Novabraid
    $0.45
    The polypropylene line is a multipurpose line that can be used for a variety of things from bow lines to dock lines. Because of its large diameter, and flotation, this line is great for general purpose around the water. Lightweight floating...
    Qty in Cart: 0
    Price:
    $0.45
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  • 5mm Polypropylene Line

    5mm Polypropylene Line

    R&W Marine Cordage
    $0.33
    The polypropylene line is a multipurpose line that can be used for a variety of things from bow lines to dock lines. Because of its large diameter, and flotation, this line is great for general purpose around the water. Lightweight floating line General...
    Qty in Cart: 0
    Price:
    $0.33
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  • 6mm Polypropylene Line

    6mm Polypropylene Line

    R&W Marine Cordage
    $0.36
    This polypropylene line is perfect for small boat bow lines and is the perfect choice for Optis and other small prams. Lightweight, floats, and sturdy enough for towing. Lightweight floating line General purpose line Sold by the foot
    Qty in Cart: 0
    Price:
    $0.36
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  • 6mm Shockcord Blue

    6mm Shockcord

    R&W Marine Cordage
    $0.46
    Shockcord (sometimes called bungee) is a stretchy line used in a variety of sailboat applications. This premium 6mm shock cord offer superior protection against abrasion and UV and is great for medium to heavy duty applications. The core is comprised of...
    Qty in Cart: 0
    Price:
    $0.46
    Subtotal:
  • 8mm Shockcord

    8mm Shockcord

    R&W Marine Cordage
    $0.55
    Shockcord (sometimes called bungee) is a stretchy line used in a variety of sailboat applications. This premium 6mm shock cord offer superior protection against abrasion and UV and is great for medium to heavy duty applications. The core is comprised of...
    Qty in Cart: 0
    Price:
    $0.55
    Subtotal:
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Shockcord

Shockcord is a unique type of line that stretches and then recovers back to the original length. The core is comprised of parallel strands of round latex rubber yielding 85% to 100% elongation and recovery, with a polyester cover. West Coast Sailing offers a high quality shockcord in a range of diameters.

Polypropylene

Polypropylene is a thermoplastic polymer material that has a wide variety of uses. For sailors, it offers a line that is tough, flexible, and strong yet lightweight enough to float which makes this ideal for dinghies and small keel boats. It is commonly used as a dinghy tow rope, an economy dinghy mainsheet, or even as a spinnaker take down line on larger keel boats.

Finding The Right Diameter

If you are replacing an existing line, the easiest way to determine what diameter you need is to match what you already have. This can be done with a caliper or by close estimation with a tape measure. If you've previously used a 7mm sheet and it has performed well, another 7mm line is likely a great choice. In most applications, there is some flexibility in the exact diameter that can be used. Most blocks, for example, have an 'ideal' diameter (ie, the line diameter that runs most effectively though the block's sheave) but also have a range so that you can run a slightly thinner or slightly thicker line. If you have a sheet that is getting hung up in your rig, stepping down 1-2mm might help the sheet run more efficiently. If you have a larger boat or rig and want to run a thinner sheet, consider a double braid line that features a Dyneema or spectra core for strength.

Line Diameter Conversion

1mm = 3/64 inch | 2mm = 5/64 inch | 3mm = 1/8 inch

4mm = 5/32 inch | 5mm = 3/16 inch | 6mm = 1/4 inch

7mm = 9/32 inch | 8mm = 5/16 inch | 9mm = 3/8 inch

10mm = 25/64 in | 11mm = 7/16 in  | 12mm = 1/2 in

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