Dow 734 Flowable Sealant

Dow 734 Flowable Sealant Datasheet
  • Description for Dow 734 Flowable Sealant

    One-part; flowable RTV sealant; self leveling, good resistance to weathering, moisture and temperature extremes; cures to a tough rubbery solid.

    *See Terms of Use Below

    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

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Liquid
    • Substrate
    • Industry
      • Other Transportation - Ammunition fuses
      • Industrial - Mechanical devices
    • Chemistry
    • Application Method
      • Brush
      • Spray
      • Flow - Flowable
      • Dip
    • Cure Method
      • Moisture / Condensation Cure - Moisture
      • Other - Acetoxy Cure
    • Color
      • Clear / Transparent - Clear
      • White
    • Key Specifications
      • 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
    Specifications
    Cure Specs
    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
    Bond Strength
    Tear Strength (piw) 3.0 (kN/m) Test Method
    Tensile Strength (psi) 1.5 (MPa) Test Method
    Material Resistance
    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
    Conductivity
    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
    Hardness
    Durability Tough
    Shore A Hardness 27 Test Method
    Elongation (%) 315 Test Method
    Flexibility Flexible
    Other Properties
    Specific Gravity 1.030 Test Method
    Flash Point (°F) 188.6
    % Solids (%) 95
    Business Information
    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

    *See Terms of Use Below

    1. Surface Preparation

      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.

    2. Application

      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.

    3. Curing

      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.

    4. Testing

      Every application involving confined cure should be thoroughly tested before use.

  • Comparable Materials for Dow 734 Flowable Sealant

    *See Terms of Use Below

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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
Fast
Viscosity Test Methods
Viscosity Test Method Temperature
Low
Pourable
45000 (mPa.s) CTM 0050, ASTM D1084 25°C
Free-flow
Self-leveling
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
Elongation Test Method
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