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#1 in Marine Magnets

Powerful, corrosion protected magnets for efficient underwater operations. 

See our range of magnets below or challenge us with a custom design.

Click the products for more information:

Latest News

Magnets Against Oil Spills

Magnets Against Oil Spills

Our magnets can be used for hundreds of applications. One of those is to secure oil containment booms to the hullside of a ship that is leaking oil. We were invited to present Blumags to the personnel responsible for the local oil spill preparedness in Hvaler, close to the Swedish border.
Say Hello to the New Willy Diving Magnets!

Say Hello to the New Willy Diving Magnets!

One year since the official launch of Blumags in 2020, we are proud to introduce the new generation of Willy diving magnets. We made a few incremental improvements that will make the world's best diving magnets (according to our customers) even better.
Blumags Goes Subsea

Blumags Goes Subsea

One of our Willy 500 models is now sitting on the wreck of the German WW2 heavy cruiser Blücher in the Oslo Fjord. Mounted on it is a yardstick used to measure the size of a crack in the hull over time. The magnet was mounted by ROV in an operation led by the Norwegian Coastal Administration (Kystverket).




We provide supreme corrosion protection by encapsulating the magnetic core in a Ni-Cu-Ni coating, and a strong and thick epoxy layer on top of that. In addition, the housing is made of stainless steel, ideal for underwater use. 



At the heart of our products is the world's most powerful magnetic material - Neodymium. Outperforming all other commercially available materials on magnetic flux and coercivity, this material is the obvious choice when holding force matters.  



Any piece of equipment can be firmly mounted directly onto the magnet. The eyenut assembly can be easily removed to provide a clearance hole for your own bolt – and should you need more, the Willy series has two additional holes. 

Contact Us

Lars Lind

Naval Architect / Co-founder

Lars has worked with both theory and practice in the marine industry since 2009. With a background in Naval Architecture, the ocean is his passion.

+47 941 44 473

Emil S. Jahren

Product Designer / Co-founder

Emil finds his motivation in learning new things, and has worked with product design and solving challenges in salvage, offshore and subsea sectors since 2008.

+47 994 42 740

In need of a custom design? We have experience with lots of different magnetic solutions, such as downhole fishing and string magnets or switch magnets.

We love a good challenge. Send us a message and we'll get back to you ASAP, within 24 hours!

Frequently Asked Questions

  • Can the magnets be shipped by air?

    Absolutely, and multiple times too. Our magnets conform strictly with IATA's packing instruction 953, and are NOT classified as dangerous goods when shipped in original tool cases.

    Read more about the regulations here (external page). Our magnets, in original tool cases, belong to this category:

    "If the maximum field strength observed at a distance of 2.1 m (7 ft) is less than 0.159 A/m (0.002 gauss) or there is no significant compass deflection (less than 0.5 degree), the article is not restricted as a magnetized material."

  • How is the holding force rating defined?

    Every single magnet is tested at the factory to ensure that the holding force is well above the rating. This is measured by pulling the magnet perpendicularly from a 30mm thick, clean mild steel plate. 

    Out in real life, the holding force will be affected by steel thickness, steel quality, and gap between magnet and steel which may be caused by rust or uneven steel surfaces.

  • What is the lateral holding force?

    There is no definite answer to this, because it depends on the friction coefficient between the magnet and surface. Important factors are paint, marine growth, corrosion, wet or dry. As a rule of thumb, you can assume 20-30% of the normal holding force rating.

  • Will the magnets demagnetize?

    Our magnets don't demagnetize, as long as you keep the magnets below 100 degrees Celsius (212 Fahrenheit) and follow the instructions in the user manual.

  • Will you do custom designs?

    Yes, of course. We control all aspects of the design and magnetic calculations. Send us an e-mail with some specifications, and we'll get right on it.