Dow 90-006-2 Aerospace Sealant

Dow 90-006-2 Aerospace Sealant Datasheet
  • Description for Dow 90-006-2 Aerospace Sealant

    Good char characteristics under low shear, medium heat flux environments; low thermal conductivity; resistant to weathering, moisture and ozone.

    Note: This material has been discontinued. Please view the Comparable Materials tab or call us at (262) 293-7970 for additional help.

    *See Terms of Use Below

    Application Type Bond, Coat, Seal
    1 Part or 2 Part 2 Part
    Material Form Liquid, Silicone elastomer
    Substrate Epoxy, Phenolic, Glass, Aluminium, Metals, Titanium, Plastic, Polyester, Cured silicone rubber, Stainless Steel, Aluminum ALCAD 2024 , Silicone resin laminates
    Industry Aircraft, Aerospace
    Manufacturer Dow
    Chemistry Silicone elastomer
    Application Method Spatula
    Cure Method Base/Curing Agent
    Cure Temperature (°C) 20 to 25, 25
    Cure Time (min) 1,440
    Viscosity (cPs) High
    Ozone Resistance Ozone resistance
    Density (g/cm³) 0.002
    Key Specifications Mil-Spec (United States Military Standard): MILC5541
  • Technical Data for Dow 90-006-2 Aerospace Sealant

    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
      • Part A Name - Base
      • Part B Name - Curing agent
    • Material Form
      • Elastomer - Silicone elastomer
      • Liquid
    • Substrate
    • Industry
    • Chemistry
    • Application Method
      • Dispenser - Pressure gun
      • Spatula/Trowel - Spatula
    • Cure Method
      • 2-Part Cure - Base/Curing Agent
    • Key Specifications
      • Mil-Spec (United States Military Standard): C5541 - MILC5541
    Cure Specs
    Cure Temperature (°C) 20 to 25, 25 Test Method
    Cure Time (min) 1,440 Test Method
    Viscosity (cPs) High
    Tack Free Time (min) 1800 (Seconds), 2700 (Seconds), 180 Test Method
    Work / Pot Time (min) 450 (Seconds), 1800 (Seconds), 120 Test Method
    Thixotropic Non-slump
    Mix Ratio 10:1 (by volume), 10:1 (by weight)
    Bond Strength
    Peel Strength (piw) 0.9 (kN/m) Test Method
    Shear Strength (psi) 3, 3 Test Method
    Tensile Strength (psi) 4.2 (Mpa) Test Method
    Material Resistance
    Ozone Resistance Ozone resistance
    Environmental Resistance Environmental resistance
    Moisture/Humidity Resistance Good
    Thermal Conductivity (W/m°K) Low, 0.35 Test Method
    Shore A Hardness 50 Test Method
    Elongation (%) 1 Test Method
    Flexibility Low temperature flexibility, Flexibility at temperature extremes
    Other Properties
    Coefficient of Thermal Expansion (CTE) 9 (Volume (1/K)) Test Method
    Flash Point (°F) 213.8
    Density (g/cm³) 0.002 Test Method
    Business Information
    Shelf Life Details When stored at or below 32°C in the original unopened containers, DOW CORNING 90006 Aerospace Sealant has a usable life of 12 months from the date of production.
    Shelf Life Type from the date of production
    Shelf Life (mon) 12
  • Best Practices for Dow 90-006-2 Aerospace Sealant

    *See Terms of Use Below

    1. Surface Preparation

      DOW CORNING 90006 Aerospace Sealant adheres well to primed surfaces of most materials used in the aerospace and aircraft industries. Typical materials include glass, cured silicone rubber, cork, phenolic, polyester, epoxy, silicone resin laminates and most metals including stainless steel, titanium and aluminum. It may not adhere well to polyethylene or certain plastics and organic materials (including rubber), which bleed or exude plasticisers. Stronger and more uniform bonds are obtained by preparing metal and plastic surfaces with DOW CORNING® 1200 Primer. For best results: Clean the surface with a chlorinated solvent (see Handling Precautions) and a slightly abrasive pad or a coarse lint-free cloth.

      Rinse cleaned surface with acetone or methyl ethyl ketone.

      Apply a thin coat of primer by dipping, brushing or spraying.

      Allow the primer to dry for at least 1 hour, according to relative humidity.

      Silicone rubber surfaces should not normally be primed, but only roughened slightly with abrasive paper and rinsed with acetone. In thin sections, a primer may be needed.

    2. Application

      After being catalysed DOW CORNING 90006 Aerospace Sealant may be applied with a spatula. It can also be loaded into a cartridge and applied from a pressure gun. Uncured excess may be removed with xylene, toluene or similar aromatic solvents.

    3. Mixing

      DOW CORNING 90006 Catalyst is added in a ratio of 1 part to 10 parts DOW CORNING 90006 Base, by weight. It may be dispersed by 2 to 5 minutes of hand mixing, or by approximately 40 cycles of a mechanical mixer. The base and catalyst are supplied in contrasting colours: when uniformity of colour is achieved, components are uniformly blended.

    4. Curing

      DOW CORNING 90006 Aerospace Sealant is useable for a minimum of 2 hours after catalyst addition, unless otherwise specified. Although a 2 hour working time is standard, DOW CORNING 90006 Aerospace Sealant is available with working times of 1/8 and 1/2 hours, under the following designations. DOW CORNING 90006 Aerospace Sealant - 1/8 DOW CORNING 90006 Aerospace Sealant - 1/2 The cure rate of DOW CORNING 90006 Aerospace Sealant may be accelerated by the application of heat

      however, the short working time versions produce finished sealants with the same physical, electrical and ablative characteristics.

  • Comparable Materials for Dow 90-006-2 Aerospace Sealant

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
20 to 25°C
25°C 50% relative humidity
Cure Time Test Methods
Cure Time Test Method
1,440 min 50% relative humidity
Tack Free Time Test Methods
Tack Free Time Test Method
1800 (Seconds), 2700 (Seconds) CTM 0095
180 min CTM 0095
Work / Pot Time Test Methods
Work / Pot Time Temperature
450 (Seconds), 1800 (Seconds) 25°C
120 min 25°C
Shear Strength Test Methods
Shear Strength Type Cure Time Cure Temperature Cure Humidity Substrate Test Method
3 psi Lap shear strength 1,440 min 25°C 50 % Aluminum ALCAD 2024 CTM 0293, Cohesive failure
3 psi Lap shear strength 1,440 min 25°C Aluminum ALCAD 2024 - treated per MIL-C-5541 CTM 0293, Cohesive failure
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
4.2 (Mpa) 1,440 min 25°C 50 (%) RH CTM 0137A, ASTM D412
Peel Strength Test Methods
Peel Strength Cure Time Cure Temperature Cure Humidity Test Method
0.9 (kN/m) 1,440 min 25°C 50 (%) RH CTM 0293, cohesive
Thermal Conductivity Test Methods
Thermal Conductivity Temperature Test Method
Low 25°C Thermal Conductivity Test Method
0.35 W/m°K cured 24 hours at 25°C and 50% relative humidity
Elongation Test Methods
Elongation Test Method
1 % CTM 0137A
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
50 CTM 0099, ASTM D2240, cured 24 hours at 25°C and 50% relative humidity 25°C
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Temperature (°C) CTE Test Method
9 (Volume (1/K)) 25°C cured 24 hours at 25°C and 50% relative humidity
Density Test Methods
Density Temperature Test Method
0.002 g/cm³ 25°C CTM 0022