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3M Aerospace AC-240 Class B-2 Fuel Tank & Fuselage Sealant

3M Aerospace AC-240 Class B-2 Fuel Tank & Fuselage Sealant

3M Aerospace AC-240 Class B-2 fuel tank and fuselage sealant from SkyGeek is specially tailored to seal aircraft fuel tanks and fuselages. This polysulfide-based material is made up of two components. When mixed, the material has a low-sag consistency, which can be applied to vertical surfaces using a spatula or extrusion gun. Once the substance has been applied, it cures quickly and forms a fuel- and chemical-resistant seal. The cured sealant maintains a flexible and strong bond with many metal substrates.

Features
  • Integral fuel tank and fuselage sealant
  • Quick cure time and long application life
  • Two-component, poly-sulfide-based material
  • Cured with manganese dioxide and free of solvent
  • Outstanding resistance to aviation gasoline, jet fuel, chemicals and petroleum products
  • Can be used on most metal substrates, such as aluminum, titanium, steel, stainless steel and glass
  • Resistant to weathering, stress and extreme temperatures
  • Once mixed, material takes on low-sag consistency
  • Apply with spatula or extrusion gun
  • Can be applied to vertical surfaces without dripping
  • Minimum application life: 2 hours
  • Typical tack-free time: 9 hours
  • Typical cure time: 10 hours
  • Mix ratio: 100 base:10 accelerator
  • 98 percent non-volatile content
  • Gray mixed color
  • Specific gravity: 1.61
  • Service temperature range: -65 degrees Fahrenheit to 250 degrees Fahrenheit with intermittent exposure up to 360 degrees Fahrenheit
  • Retains flexibility at low temperatures

Read the Technical Data Sheet.

Use Instructions
Two-Part Sealant Cartridges:

  1. Holding the cartridge, grasp the dasher rod and pull back approximately one inch

  2. Insert the ramrod into the hollow of the dasher rod, break the piston loose, and inject about 1/3 of the contents into the cartridge

    Note: Do not inject all of catalyst in one location. Distribute evenly throughout base material


  3. Repeat steps 2 and 3 until all the contents of the rod are emptied into the cartridge. Remove the ramrod

  4. Mix for the required number of strokes (hand mixing) or for the required amount of time (machine mixing) indicated in the kit instructions

  5. When mixing is complete, remove bottom cap

  6. Pull the dasher rod back to the neck of the cartridge, grasp the cartridge firmly at the neck, unscrew the dasher rod and remove

  7. Screw the nozzle into the cartridge, insert into the extrusion gun and use as required. For hand extrusion, press the used dasher rod against the plunger to force the material from the cartridge

Storage

The shelf life of AC-240 Class B is 9 months from date of packaging, when stored at temperatures below 80 degrees F in its original container.

Mixed AC-240 Class b may be stored under refrigeration as follows: 15 days at -10 degrees F, 30 days at -40 degrees F.

It is important to remember that freezing, storing and thawing procedures reduce application life. Also, frozen storage will reduce application life by varying amounts depending on the storage temperature and length of storage time. All aspects of storage, freezing and thawing should be planned carefully and it is not recommended to mix and freeze with less than half an hour application time.

Health and Safety Precautions

AC-240 Class B sealant is safe to use and apply when recommended precautions are followed. Before using this product, read and understand the Material Safety Data Sheet (MSDS), which provides information on health, physical and environmental hazards, handling precautions and first aid recommendations. An MSDS is available on request. Avoid overexposure. Obtain medical care in case of extreme overexposure.

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Part Number
051141-57958
Size
25 Gram Kit
Spec
AMS-S-8802C Class B-2, Type II
Price
$9.12
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Qty
Certification
Material Safety Data Sheet:
MSDS1
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Part Number
051141-57955
Size
2 oz Kit
Spec
AMS-S-8802D Class B-2, Type II
Price
$23.22
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Certification
Material Safety Data Sheet:
MSDS1
Country of Origin: United States
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Part Number
051141-57959
Size
3.5 oz Kit
Spec
AMS-S-8802D Class B-2, Type II
Price
$25.76
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Qty
Certification
Material Safety Data Sheet:
MSDS1
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Part Number
051141-57966
Size
Pint Kit
Spec
AMS-S-8802D Class B-2, Type II
Price
$50.02
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Qty
Certification
Material Safety Data Sheet:
MSDS1
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Part Number
051141-57967
Size
Quart Kit
Spec
AMS-S-8802D Class B-2, Type II
Price
$105.42 (ea.)
(Sold in increments of 9)
Qty
Certification
Material Safety Data Sheet:
MSDS1
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