In Stock

5mm Robline Sirius 500 Line

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Current Stock:
5 mm
Line Type:
Polyester Double Braid

Frequently Bought Together:

5mm Sirius 500 Line
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5mm Sirius 500 from Robline is a great low stretch yet affordable line for control lines, halyards, and other application on recreational sailboats. This is a double braid polyester line, meaning it has a 8-plait polyester core and a 32-plait polyester cover, and is known for its high breaking loads and minimal stretch. The line holds up very well in hardware such as cleats, making it a great option for many small boat and recreational cruising sailors.

  • Colors: Red, Blue, Green, Black
  • Diameter - 5mm (3/16 inch)
  • Other Available Diameters - 4mm
  • Core - 8 Plait 100% Polyester
  • Cover - 32 Plait 100% Polyester
  • Applications - Control Lines, Halyards
  • Features - Double Braid, Low Stretch
  • Average Strength - 1873 lbs
  • SOLD BY THE FOOT (Quantity 1 = 1 Foot. Adjust quantity to order longer lengths)


  • Stretch - Polyester offers relatively low stretch and acceptable for recreational applications
  • Material - 100% polyester for both cover and core
  • Splicing - This line is not recommended for splicing

Product Reviews (1)

  • 3

    I am changing them out.

    I have used this line for recreational dinghy control lines for a few years. I they were inexpensive and worked good enough for a time. However, I am planning to change them to something else as they do not seem to like being spliced and bowlines tied in them tend to slip under load on the water. A backup overhand knot in the tail end did work to hold the bowline and really is absolutely necessary for any sort of confidence to be had in the knot. I imagine there are better lines out there for just a few dollars more per line

Shipping & Returns

Delivery Info: Enjoy Free Standard Shipping on most orders* to the Continental United States over $99. Our Standard Shipping method utilizes USPS, UPS, and FedEx to send packages near and far. Oversize/Freight shipping (where applicable), Expedited Shipping (where available), and rates to other destinations will be calculated at checkout.

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Returns Info: Your 100% satisfaction is our goal - we want you to love your sailing gear, but if something doesn't work out, we accept returns on most new, unused items*. Returns can be made within 366 days (1 year + 1 day) of your original order date. Exceptions include (and are not limited to) cut line, Rig Shop products, special order items, numbered sailors, and items used or worn sailing.

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