Application Type Seal, Gasketing: Formed-in-place gaskets, Coating 1 Part or 2 Part 1 Part Material Form Liquid Substrate Ceramics, Metals, Plastics Manufacturer Dow Chemistry Silicone Rubber Cure Method Moisture, Acetoxy Cure Cure Temperature (°C) 20 to 25, 25 Cure Time (min) 1,440 Viscosity (cPs) Low, Pourable, 45000 (mPa.s), Free-flow, Self-leveling Color Clear, White Ozone Resistance Ozone resistance High Temperature Resistance (°C) 177, 204 Low Temperature Resistance (°C) -65 Durability Tough Key Specifications FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): FDA 21 CFR177.2600, Mil-Spec (United States Military Standard): MIL-A-46106
Technical Data for Dow 734 Flowable Sealant
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- Other Transportation - Ammunition fuses
- Industrial - Mechanical devices
- Silicone - Silicone Rubber
- Flow - Flowable
- Moisture / Condensation Cure - Moisture
- Other - Acetoxy Cure
- Clear / Transparent - Clear
- FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): 177.2600 - FDA 21 CFR177.2600
- Mil-Spec (United States Military Standard): A-46106 - MIL-A-46106
Cure Temperature (°C) 20 to 25, 25 Test Method Cure Time (min) 1,440 Test Method Viscosity (cPs) Low, Pourable, 45000 (mPa.s), Free-flow, Self-leveling Test Method Tack Free Time (min) 13, Fast Test Method Work / Pot Time (min) 7 Test Method
Tear Strength (piw) 3.0 (kN/m) Test Method Tensile Strength (psi) 1.5 (MPa) Test Method
Ozone Resistance Ozone resistance Environmental Resistance Environmental resistance High Temperature Resistance (°C) 177, 204 Low Temperature Resistance (°C) -65 Moisture/Humidity Resistance Moisture/humidity resistance Vibration Resistance/Shock Resistance Vibration
Dissipation Factor 0.00034, 0.00019 Test Method Dielectric Strength (V/mil) 17 (kV/mm) Test Method Dielectric Constant 2.70, 2.70 Test Method Volume Resistivity (O) 1e15 (ohms/cm) Test Method
Durability Tough Shore A Hardness 27 Test Method Elongation (%) 315 Test Method Flexibility Flexible
Specific Gravity 1.030 Test Method Flash Point (°F) 188.6 % Solids (%) 95
Shelf Life Details Product should be stored at or below 32°C (90°F) in original, unopened containers. Shelf Life Temperature (°F) <90 Shelf Life Type From date of manufacture Shelf Life (mon) 24
Not Good For
Don't Use With concrete, brick, mortar, other masonry surfaces, surfaces to be painted, materials such as impregnated woods, oil-based caulks that bleed oils, polyethylene, polypropylene, methylmethacrylate, on or near sensitive metals such as copper, brass, zinc, carbon steel, galvanized iron, magnesium
Best Practices for Dow 734 Flowable Sealant
Clean all surfaces using Dow Corning® brand OS (Ozone- Safe) Fluids or another suitable solvent. Rubber surfaces should be roughened with sandpaper and wiped with Dow Corning OS Fluids or another suitable solvent.
Apply a thin film of Dow Corning 1200 Prime Coat or Dow Corning P5200 Adhesion Promoter to all surfaces except silicone rubber. The prime coat should be allowed to dry one hour. Longer drying time may be required under conditions of low humidity.
Dow Corning 734 Flowable Sealant is easy to use. It pours readily from its container for dip, brush or spray application.
If Dow Corning 734 Flowable Sealant is being used as an adhesive, it should be applied to both surfaces and immediately put in place with enough pressure to ensure uniform contact.
Dow Corning 734 Flowable Sealant begins to cure upon exposure to moisture in the air. The cure progresses inward from the surface. At 24°C (75°F) and 50 percent relative humidity, the sealant forms a tack-free skin in about 15 minutes.
Material beneath the tack-free skin continues to cure. Curing time is extended as the thickness of the rubber increases.
In applications where Dow Corning 734 Flowable Sealant is partly confined during cure, the time required for proper cure is lengthened. It is possible, with absolute confinement, that cure will not be completed. Metal-to-metal bonds should not overlap more than one inch. Every application involving confined cure should be thoroughly tested before use.
Let the unit stand undisturbed until cured.
Every application involving confined cure should be thoroughly tested before use.
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Cure Temperature Test Methods
|Cure Temperature||Cure Time Test Method|
|20 to 25°C|
|25°C||After skin formation, cure continues inward from the surface. In 24 hours (at room temperature and 50% relative humidity)|
Cure Time Test Methods
|Cure Time||Test Method|
|1,440 min||After skin formation, cure continues inward from the surface. In 24 hours (at room temperature and 50% relative humidity)|
Tack Free Time Test Methods
|Tack Free Time||Tack Free Temperature||Test Method|
|13 min||25°C||CTM 0095|
Viscosity Test Methods
|45000 (mPa.s)||CTM 0050, ASTM D1084||25°C|
Work / Pot Time Test Methods
|Work / Pot Time||Test Method||Temperature|
|7 min||CTM 0098||25°C|
Tensile Strength Test Methods
|Tensile Strength||Cure Time||Cure Temperature||Test Humidity||Test Method|
|1.5 (MPa)||10,080 min||25°C||50 %||Mechanical properties, cured 7 days in air at 25°C (77°F) and 50% relative humidity, CTM 0137A, ASTM D412|
Tear Strength Test Methods
|Tear Strength||Cure Time||Cure Temperature||Test Method|
|3.0 (kN/m)||10,080 min||25°C||Mechanical properties, cured 7 days in air at 25°C (77°F) and 50% relative humidity, CTM 0159A, ASTM D624|
Dielectric Constant Test Methods
|Dielectric Constant||Test Method|
|2.70||Dielectric Constant, 100 Hz|
|2.70||Dielectric Constant, 100 KHz|
Dielectric Strength Test Methods
|Dielectric Strength||Temperature||Test Method|
|17 (kV/mm)||25°C||Electrical properties, after 7 days cure in air at 25°C (77°F) and 50% relative humidity, CTM 0114, ASTM D149|
Dissipation Factor Test Methods
|Dissipation Factor||Test Method|
|0.00034||Dissipation factor, 100Hz, Electrical properties, after 7 days cure in air at 25°C (77°F) and 50% relative humidity, CTM 0112, ASTM D150|
|0.00019||Dissipation factor, 100 KHz, Electrical properties, after 7 days cure in air at 25°C (77°F) and 50% relative humidity, CTM 0112, ASTM D150|
Volume Resistivity Test Methods
|Volume Resistivity||Temp (°C)||Test Method|
|1e15 (ohms/cm)||21 to 25°C||Electrical properties, after 7 days cure in air at 25°C (77°F) and 50% relative humidity, CTM 0249, ASTM D257|
Elongation Test Methods
|315 %||Mechanical properties, cured 7 days in air at 25°C (77°F) and 50% relative humidity, CTM 0137A, ASTM D412|
Shore A Hardness Test Methods
|Shore A Hardness||Shore Hardness Test Method||Hardness Temperature|
|27||Mechanical properties, cured 7 days in air at 25°C (77°F) and 50% relative humidity, CTM 0099, ASTM D2240||25°C|
Specific Gravity Test Methods
|Specific Gravity||Temperature||Test Method|
|1.030||25°C||Mechanical properties, cured 7 days in air at 25°C (77°F) and 50% relative humidity, CTM 0022, ASTM D792|