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3M Aerospace AC-215 Class B Access Door Aerospace Sealant

3M Aerospace AC-215 Class B Access Door Aerospace Sealant

Create a strong seal with 3M™ Aerospace Sealant AC-215 Class B access door aerospace sealant from SkyGeek. This polysulfide access door sealant is low-shrinkage and low-odor. Itís specially designed for faying surfaces in which easy separation of joined surfaces is critical. Apply the low-sag, red paste with a spatula, putty knife or caulking gun. Once the sealant has cured, it forms a low-adhesion, tough and rubbery gasket. It also molds well to surface irregularities.

Approvals, References and Specifications
  • GSA Approval: MIL-S-8784
  • Qualification: TAPS 1163 Ty IV
  • Qualification (Pre-mixed and Frozen): 299-947-074
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-215 Class B is 12 months from date of packaging, when stored at temperatures below 80 degrees F in its original container.

Mixed AC-215 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-215 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.

Features
  • Access door sealant for use with aerospace metallic structures and pressurized vehicles
  • Gaskets for removable parts
  • Strippable fillets
  • Specially formulated with low adhesion to seal in areas in which separation of joined surfaces is necessary
  • Resistant to fuel and chemicals commonly used in the aviation industry
  • Forms tough, rubbery gasket that molds well to surface irregularities when sealant is cured
  • Negligible shrinkage do to no added solvent
  • Distinguishable from other types of sealant thanks to unique red color
Specifications
MIL-S-8784 - GSA Approved
TAPS 1163 Ty IV - Qualified
299-947-074 - Qualified (pre-mixed and frozen)

Typical Physical and Application Properties

  • Color: Base - Red/Pink, Accelerator - Black

  • Mix Ratio: 100 base/ 10 accelerator (by weight)

  • Non-Volatile Content: 98%

  • Viscosity (Brookfield #7 Spindle @ 2rpm): 7,000 - 9,000 poise

  • Vertical Flow: 0.25" - 1.25"

  • Application Life and Cure Time

    (At 75 degrees F, 50% Relative Humidity)

    B-1/2

  • Minimum Application Life*: 1/2 hour

  • Typical Tack Free Time**: 10 hours

  • Typical Cure Time***: 24 hours

  • B-2

  • Minimum Application Life*: 2 hours

  • Typical Tack Free Time**: 24 hours

  • Typical Cure Time***: 48 hours
  • *Application Life refers to the length of time that mixed compound remains at a consistency suitable for application with roller or brush. Application life is always measured at a standard temperature of 75 degrees F with a relative humidity level of 50%. In general, for every 20 degrees F rise in temperature, the application life is halved; and for every 20 degree drop, it is doubled. High humidity levels during the mixing process will shorten application life.

    **Tack-free Time is the length of time after which a mixed sealant will no longer tightly adhere to L-LP-690 standard low density polyethylene film.

    ***Cure time is defined as the length of time it takes AC-215 Class B sealant to reach 30A hardness. It depends on three factors: remaining application life, temperature and relative humidity. To a certain extent, the temperature/humidity factors for application life also apply to curing. To accelerate the curing process, apply heat up to (but not more than) 120 degrees F.

    Typical Physical and Performance Properties of Cured Compound when tested per MIL-S-8784

  • Color: red/Purple

  • Specific Gravity: 1.52

  • Hardness: 45 Shore "A"

  • Adhesion to Aluminum, steel, stainless stell, titanium, zinc, cadmium, chromium, magnesium, glass, enamel, Epoxy MIL-P-2337 and Urethane MIL-C-27725: 2lb./in of width 100% adhesive failure

  • Temperature Range: -65 degrees F to +250 degrees F

  • Low Temperature Flexibility: -65 degrees F, conforms

  • Fuel Resistance: 6% weight loss after 7 days at 130 degrees F in TT-s-735, Type II fuel

  • Resistance to Other Fluids: Excellent resistance to water, alcohol, petroleum and synthetic lubricating oils and petroleum-base hydraulic fluids

  • Effect on Acrylic Plastics*: Will not cause crazing

  • Fungus Resistance: Non-nutrient
  • *Not a specification requirement

    View DetailsEnable JS
    Part Number
    051141-57859
    Size
    25 Gram Kit
    Spec
    MIL-S-8784B Class B-1/2
    Price
    $9.86
    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: USA
    View DetailsEnable JS
    Part Number
    051141-57858
    Size
    2 oz Kit
    Spec
    MIL-S-8784B Class B-1/2
    Price
    $27.63
    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: USA
    View DetailsEnable JS
    Part Number
    051141-57860
    Size
    3.5 oz Kit
    Spec
    MIL-S-8784B, Class B-1/2
    Price
    $35.84
    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: USA
    View DetailsEnable JS
    Part Number
    051141-57863
    Size
    2 oz Kit
    Spec
    MIL-S-8784B Class B-2
    Price
    $27.63
    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: USA
    View DetailsEnable JS
    Part Number
    051141-57864
    Size
    3.5 oz Kit
    Spec
    MIL-S-8784B Class B-2
    Price
    $35.84
    Hover for Qty Pricing
    Qty
    Certification
    Material Safety Data Sheet:
    MSDS1
    Country of Origin: USA
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