Why Mastrant?

  • Designed for guying
  • UV resistance
  • High strength
  • Low elongation – no stretch
  • Weather durability
  • Wide range of accessories and "must haves" for antenna work

Designed for guying

The Mastrant® optimized ropes are made from proven modern materials: Polyester and Dyneema®. The range covers products for a variety of applications, from thin support lines used for tying wire antennas and beams, to guys for supporting small and portable masts and vertical antennas, to guying ropes for high antenna towers tens of metres high.

The development, testing and quality control of all these products ensures a superior product delivering long life. They are subject to continuous verifying in real conditions in co-operation with many users.
In the real life we have installations more than 10 years old with no signs of deteriorating.

“Is Mastrant® made from Kevlar?”

People are used to using Kevlar for “high strength ropes with lower elongation". No matter what material the rope is made of. Kevlar (or Technora, Twaron, etc.) are brand names for aramid fibres. Those fibres are susceptible to UV degradation so they are always protected with extruded outer protective jackets - for example Phillystran® HPTG-I.

However, there is another material for ropes for mast guying - high-modulus polyethylene; trade names are Dyneema® or Spectra®. It has excellent UV resistance, high knot strength and low specific gravity. Mastrant-M ropes using new Dyneema® Max Technology maximizes the scope of the world’s strongest fiber. Mastrant® is pioneering the use of high performance synthetic rope in permanently loaded applications. Designed specifically for mooring production facilities in deep waters, DSM’s new ‘ultra high strength at low weight’ Dyneema® DM20 fiber delivers unrivalled rope strength, stiffness, durability and longevity.

UV resistance

All Mastrant® ropes have covers made from Polyester, which is fully UV radiation resistant. The ropes made from pure Dyneema® have special protective finish which endows the rope with unusual UV radiation resistance.

High strength

The Mastrant® ropes are exceptionally strong – not only the extra-strong product line Mastrant-M, but also the basic Performance/Price optimized ropes overcome standard synthetic ropes.

Low elongation – no stretch

The design of Mastrant® ropes is optimised for guying – so the lowest stretch is one of the most important features what we had in the mind.

Weather durability

Mastrant® ropes are all weather durable and resistant to acids and alkali.

Wide range of accessories and "must haves" for antenna work

The assortment covers over 300 products for termination of the ropes, connecting, tightening, safe bending, cutting, ... When you are working on a mast, you can quite often move to different heights or positions. That is why it is necessary to be very careful and to use appropriate personal protective equipment – this is the reason why we also offer wide range of personal protective equipment and tools.


  • New products 2020 26. 9. 2020

    We have added several new products to our range, which you have shown interest in or which we have found interesting. It's about: smooth snap hooks, double anti-tangle pulleys, cleat grips (one handed and two handed), big thimble, big eye-hook turnbuckles. Also, you can order 50m (165 ft.) lengths of most ropes for the same unit price as 100m.

  • Mastrant-Q 2. 2. 2020

    In 2019 we have developed replacement for “thick” ropes Mastrant-P. The line of diameters 6-8-10-12-14 will be replaced by new ropes Mastrant-Q with complex cores (Polyester and Polypropylene fibers) in diameters 6-8-11-14. These new ropes belongs to CLASSIC class and are even less expensive than Mastrant-P. Details.

  • Light version of Mast clamps available 27. 2. 2019

    Our original stainless steel mast clamps are already available also in light version. Guying Mast Clamp MA2 Light, Stainless

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