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 Aerospace, Aircraft 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
1 Part or 2 Part
- 1 Part or 2 Part - 2 Part
- Part A Name - Base
- Part B Name - Curing agent
- Elastomer - Silicone elastomer
- Silicone - Silicone elastomer
- Dispenser - Pressure gun
- Spatula/Trowel - Spatula
- 2-Part Cure - Base/Curing Agent
- Mil-Spec (United States Military Standard): C5541 - MILC5541
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)
Peel Strength (piw) 0.9 (kN/m) Test Method Shear Strength (psi) 3, 3 Test Method Tensile Strength (psi) 4.2 (Mpa) Test Method
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
Coefficient of Thermal Expansion (CTE) 9 (Volume (1/K)) Test Method Flash Point (°F) 213.8 Density (g/cm³) 0.002 Test Method
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
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.
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.
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.
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.
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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|
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
|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
|0.002 g/cm³||25°C||CTM 0022|