STEELGARD 521 & 973


Steelgard 521 & 973

Keep your machinery, equipment, vehicles, metal parts, spares etc. safe from corrosion during manufacture, storage, packaging, transportation and export.

Clean, Quick, Simple

  • Spray, dip, mist or swab for protective coverage
  • Thin, transparent lubricating protective film
  • Good handling – no messy thick, sticky coatings

High Performance

  • Outperforms traditional thicker, heavier oils
  • Powerful water displacer
  • Reliable, long-term protection


  • Protects all ferrous and non-ferrous metals and alloys
  • Coats complete assemblies
  • Generally, no need to remove but can be wiped off or cleaned with solvent wash


  • High coverage rates
  • Save time and labour costs – quick and easy to apply
  • Dries fast – minimal holdups

Why Steelgard 521?

Steelgard 521 is the easy way to protect metal parts and surfaces from corrosion during manufacture, storage and shipping.  For industrial use it can be easily decanted into sprayers or used in dip-tanks. Applied at every stage of metalwork from first cut or immediately after casting and after each stage of machining and finishing, it prevents pinprick rust from setting in and wards off corrosion issues, ensuring your products arrive with your customers in perfect condition.

Steelgard 521 and Steelgard 973 holds M.O.D. approval to Defence Standard (PX-24) 68/10 Issue 03 and 05(NATO Code C-634) and are approved for use by the Royal Dockyard at Devonport for use within the British submarine and nuclear submarine fleet.

Originally formulated to comply with the original Def Stan (PX-24) 68/10 issue 01, we have had a Steelgard product approved under every issue since.  Available in two different formulations Steelgard 521 approved to (PX-24) 68/10 issue 03 (40 deg C flash point solvent). And Steelgard 973 approved to (PX-24) 68/10 issue 05 (60 deg C flash point solvent).

An extremely high-quality product which replaces traditional oily, messy coatings or lacquers which can be unreliable and difficult to remove.  Steelgard 521 is compatible with most fuels and lubricants so does not need removing before automotive parts are put into service.  If required, Steelgard 521 can be simply wiped off and if your product needs to be coated or the bare metal exposed for any reason, a simple solvent wash will remove all traces.

Not just for precision engineers and submarine technicians, there are 1001 uses for Steelgard 521 around the home, garage, factory and inspection pit.  Far more effective at dewatering and lubricating than most, similar, products but also packed with corrosion inhibitors to protect everything it touches from rust and corrosion.


Other Steelgard Products


General Purpose corrosion preventative.  Dewaters, protects, no mess, no fuss.

Does everything required in the most cost effective and economical way. High coverage rate!

Steelgard 521 & 973

Versatile and very high quality.  Holds MoD and NATO approvals PX-24

(DEF STAN 68/10 issue 03/05) 


Steelgard RP Grease

Heavy duty rust prevention compound. Affords unrivalled protection to any metal systems.

Used extensively to protect coiled tubing between uses on oil and gas rigs. 

Steelgard Export

Protect parts and goods during transport and shipping. Formulated specifically to give superior protection yet be easily applied and removed when required. High coverage rate.

Steelgard TD

Touch Dry formulations for improved handling. Excellent performance from a thin film temporary protective (typically 2-3 micron) coverage up to 120 square metre per litre.

Steelgard 5in1

5in1 aerosol cans, ideal for household use, small businesses, vehicle maintenance.
De-waters, penetrates and prevents corrosion. Manufactured to the requirements of PX-24.

Here to help…

Unsure which Steelgard is right for your corrosion problem?  I can help you decide. 

Over the years we have developed many different Steelgard formulations for specific applications from Touch Dry to Acid Resistant, Export to RP Grease.  If we do not already have exactly what you need, we will formulate a cost-effective Steelgard material that is perfect for you.

Call Vapor-Tek Ltd now on 01204 521795