Industrial & Pro Coatings

640 / 7640 Permanent Protect

These are highly advanced SiO² coatings which were created to address the needs of the marine, military and aerospace sectors. They are massively resistant to corrosion, abrasion and temperature. They can be applied to metal, plastic, powder coated and painted substrates. The coatings can be heat cured, or cured at ambient temperature. 640 / 7640 Permanent Protector react with the substrates surface and form an abrasion resistant coating with very high bonding properties on metal. They generate thin, transparent coatings with high impact strength and is resistant to alkali, abrasion and corrosion.

Difference between 640 and 7640

The 7640 offers almost identical performance characteristics to the 640 coating but the solvent balance has been altered in order to allow for a longer working time. The coating can be applied in exactly the same way as the 640 coating but buffing (if required) can be conducted up to 20 minutes after application. This makes the application on to autos, aircraft and boats, significantly easier. All of the other key points are the same as 640.

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Key Features

Application Temperature

-5°C - +35°C

Coverage Rate per Liter

40 - 100m2

Durability of the Coating

Up to 25 years

Shelf Life of the Liquid

24 months when stored in original containers,
6-12 months after opening

Storage Temperature

+5°C - +20°C

Curing Time

5-7 days at 20°C, 1 day at 60°C (surface usable after 1 hour), 2 hours at 200°C


  • Contains solvent (not water)
  • Clear, colourless liquid based on silanes
  • Ultra high performance, hardness of 7-9H
  • High impact strength
  • Is ideally suited for the water/dirt-repellent coating of non-absorbent materials in outdoor and indoor areas
  • Can be sprayed or wiped on to surfaces
  • Generates a generally invisible surface. The coating does provide a glossy appearance
  • Extremely resistant to corrosion, alkali, abrasion, sea water and salty air (extensive Salt spray testing has been conducted. In addition testing shows that this coating is also resistance to rocket fuel!)
  • Highly resistant to a large number of organic solvents
  • Treated surfaces remain clean for prolonged periods and are “easy to clean”
  • Protected surfaces provide reduced costs for cleaning and care
  • Food safe
  • Heat resistant up to 700-750°C working temperatures
  • Cold resistant up to -90°C
  • Highly effective for up to 25 years
  • Heat drying increates the hardness of the coating, which ranges from 7H (for room temperature curing) to 9H (for heat curing)

ALGT© Corrosion Protection

Use on materials such as

  • Ferrous metals
  • Non ferrous metals
  • Galvanised metals
  • Varnished surfaces
  • Powder coated surfaces
  • Plastic, e.g. window frames
  • Anodized aluminium
  • Painted surfaces
  • ...