Brand Dowsil Application Type Dispersion Coating, Seal, Excellent release properties 1 Part or 2 Part 1 Part Material Form Liquid Substrate 2024 Aluminum (primed) Industry Electrical, Radar antennae, Rockets, Undersides of aircraft, Vehicles orbiting in space, Engine cases, Steel cables, Fuel transfer lines, Aircraft, Vehicles orbiting in space, Structural members and undersides of aircraft Manufacturer Dow Chemistry Silicone Cure Method Air-drying, Room temperature curing Cure Temperature (°C) 25 Cure Time (min) 4,320 Viscosity (cPs) 8,200 Color Translucent Ozone Resistance Resists ozone Chemical Resistance Resists chemicals High Temperature Resistance (°C) <260 Other Resistance Resists ice Durability Tough
Technical Data for Dow Dowsil 92-009 Dispersion Coating
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- Aluminum - 2024 Aluminum (primed)
- Aerospace - Rockets, Fuel transfer lines
- Radar - Radar antennae
- Aircraft - Undersides of aircraft, Structural members and undersides of aircraft
- Space Applications - Vehicles orbiting in space, Vehicles orbiting in space
- Electronics - Electrical
- Industrial - Fan blades used in wind tunnels, Launch equipment from corroding and eroding, Struts
- Engine - Engine cases
- Cable - Steel cables
- Other - Environmental sealing
- Flow - Pour
- Room Temperature / Air Dry - Air-drying, Room temperature curing
Cure Temperature (°C) 25 Test Method Cure Time (min) 4,320 Test Method Viscosity (cPs) 8,200 Test Method Tack Free Time (min) 40 Test Method
General Bond Strength (psi) Excellent Tear Strength (piw) High, 180 (ppi) Test Method Tensile Strength (psi) 1,300 Test Method
Ozone Resistance Resists ozone Chemical Resistance Resists chemicals UV Resistance Resists ultraviolet radiation Environmental Resistance Resists weathering High Temperature Resistance (°C) <260 Moisture/Humidity Resistance Resists moisture Other Resistance Resists ice
Thermal Conductivity (W/m°K) 2.18, 1.26 (Btu-in/ft2 hour) Test Method Volume Resistivity (O) 5.4e14 (ohm/cm) Test Method
Durability Tough Shore A Hardness 46 Test Method Elongation (%) 7 Test Method
Specific Gravity 1.110 Test Method Flash Point (°F) 64.4 Test Method
Shelf Life Details When stored below 32°C (90°F) in closed containers, Dow Corning 92-009 Dispersion Coating has a shelf life of 9 months from date of manufacture. Shelf Life Type From date of manufacture Shelf Life (mon) 9
Best Practices for Dow Dowsil 92-009 Dispersion Coating
In most cases, substantially stronger and more uniform adhesion is obtained by preparing the surface to be treated with DOWSIL™ 1200 OS Primer. The following steps are recommended for all surfaces except silicone rubber. (Silicone rubber surfaces should be roughened with sandpaper and then cleaned with acetone before applying the coating.)
Thoroughly clean and degrease the surface.
Rinse all cleaning agents off surface with acetone or methyl ethyl ketone.
After rinse agent has dried, apply a coat of DOWSIL™ 1200 OS Primer by dipping, brushing, or spraying. Typically, a very thin coating of primer will provide the best adhesion. If cracks appear in the chalked film, too much primer was applied.
Under typical room temperature and humidity conditions, the primer should be allowed to air-dry for 60 to 90 minutes. Because the prime coat is moisture sensitive, low humidity will necessitate a longer drying time.
Apply DOWSIL™ 92-009 Dispersion Coating.
DOWSIL™ 92-009 Dispersion Coating can be applied by brushing, dipping, or pouring as supplied. If spraying is the preferred application method, the coating can be thinned with naphtha to any viscosity necessary for use with the intended spray equipment (see Mixing Recommendations). As supplied, the average build per coat is 5 to 6 mils.
For the smoothest coat, the following procedure is recommended: 1. Dilute the coating using a 1.3 to 1 ratio of naphtha to coating by volume (1 to 1 by weight).
2. Apply four passes in rapid succession per coat.
3. If extra buildup is desired, apply successive coats within 30 minutes after the preceding coat was applied. If this is not possible, allow the coated surface to air-dry four hours before applying the next coat.
Thicker coatings may also be achieved by using less naphtha
however, a rougher surface may result.
Pigmentation: DOWSIL™ 92-009 Dispersion Coating is easily pigmented for applications requiring color. To obtain good coverage, the pigment should comprise at least 3 percent of the total formulation by weight. When pigmenting the coating white, zinc oxide or titanium dioxide is recommended. Using the smallest available particle size will minimize settling problems. For other colors, silicone color concentrates–pigment dispersed in a silicone oil to form a paste material–provide the easiest application with the best results. Only two parts per 100 are required (see Mixing Recommendations).
Any solvent or pigment added to DOWSIL™ 92-009 Dispersion Coating must be free of moisture to prevent premature gellation. This can be accomplished by adding the solvent or filler to the coating and rolling the combination in a closed container until thoroughly mixed, or by mixing in a commercial paint shaker. Zinc oxide or titanium dioxide should be dried 24 hours at 200°C (392°F) in trays before adding it to the coating.
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Cure Temperature Test Methods
|Cure Temperature||Cure Time Test Method|
|25°C||50% relative humidity|
Cure Time Test Methods
|Cure Time||Test Method|
|4,320 min||50% relative humidity|
Tack Free Time Test Methods
|Tack Free Time||Tack Free Temperature||Test Method|
|40 min||25°C||CTM 0095|
Viscosity Test Methods
|8,200 cPs||CTM 0050|
Tensile Strength Test Methods
|Tensile Strength||Test Method|
|1,300 psi||ASTM D 412|
Tear Strength Test Methods
|Tear Strength||Test Method|
|180 (ppi)||ASTM D 624, Die B|
Thermal Conductivity Test Methods
|Thermal Conductivity||Test Method|
|2.18 W/m°K||CTM 0224|
|1.26 (Btu-in/ft2 hour)||CTM 0224|
Volume Resistivity Test Methods
|Volume Resistivity||Test Method|
|5.4e14 (ohm/cm)||CTM 0249|
Elongation Test Methods
|7 %||ASTM D 412|
Shore A Hardness Test Methods
|Shore A Hardness||Shore Hardness Test Method|
|46||Durometer, ASTM D 676|
Flash Point Test Methods
|Flash Point||Test Method|
Specific Gravity Test Methods
|Specific Gravity||Test Method|