Dow 736 Heat Resistant Sealant

Dow 736 Heat Resistant Sealant Datasheet
  • Description for Dow 736 Heat Resistant Sealant

    One-part; non-slumping RTV paste, good resistance to weathering, moisture and excellent resistance to high temperature; cures to a tough rubbery solid.

    *See Terms of Use Below

    Brand Dowsil
    Application Type Seal, Aerospace gasketing
    1 Part or 2 Part 1 Part
    Material Form Paste
    Substrate Metals, Plastics, Rubber
    Industry Bag filters on smoke stacks
    Manufacturer Dow
    Chemistry Silicone
    Application Method Spatula, Wooden paddle
    Cure Method Moisture
    Cure Temperature (°C) 25, 25, 25
    Cure Time (min) 1,440, 4,320
    Viscosity (cPs) Controlled, Non-sag, NonFlow
    Color Red
    High Temperature Resistance (°C) 260, 315
    Low Temperature Resistance (°C) -65
    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-46106A
  • Technical Data for Dow 736 Heat Resistant Sealant

    Overview
    • Application Type
      • Gasketing - Aerospace gasketing
      • Sealant - Seal
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Paste
    • Substrate
    • Industry
      • Industrial - Heating elements, Industrial ovens
      • Filters - Bag filters on smoke stacks
      • Appliances - Oven belts
    • Chemistry
    • Application Method
      • Spatula/Trowel - Spatula, Wooden paddle
    • Cure Method
      • Moisture / Condensation Cure - Moisture
    • Color
      • Red
    • 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-46106A - MIL-A-46106A
    • Brand
      • Dowsil
    Specifications
    Cure Specs
    Cure Temperature (°C) 25, 25, 25 Test Method
    Cure Time (min) 1,440, 4,320 Test Method
    Viscosity (cPs) Controlled, Non-sag, NonFlow
    Tack Free Time (min) 17 Test Method
    Work / Pot Time (min) 10 Test Method
    Bond Strength
    Tensile Strength (psi) 350 Test Method
    Material Resistance
    Environmental Resistance Good
    High Temperature Resistance (°C) 260, 315
    Low Temperature Resistance (°C) -65
    Hardness
    Shore A Hardness 26 Test Method
    Elongation (%) 600 Test Method
    Other Properties
    Specific Gravity 1.040
    Business Information
    Shelf Life Details When stored in its original, unopened container below 32°C (90°F), Dow Corning 736 Heat Resistant Sealant has a shelf life of 30 months from date of manufacture. Refer to product packaging for “Use By” date.
    Shelf Life Temperature (°F) <90
    Shelf Life Type from date of manufacture
    Shelf Life (mon) 30
    Not Good For
    Don't Use With concrete, brick, Mortar or other masonry surfaces, surfaces to be painted, impregnated woods or oil-based caulks that bleed oils, polyethylene, polypropylene, methylmethacrylate, copper, brass, zinc, carbon steel, galvanized iron, magnesium, On some plastics; may cause stress cracks, For continuous underwater immersion where adhesion or structural bonding is required, On Teflon coated materials, Sealant
  • Best Practices for Dow 736 Heat Resistant Sealant

    *See Terms of Use Below

    1. Surface Preparation

      Thoroughly clean and degrease metal and plastic surfaces using Dow Corning® brand OS (Ozone Safe) Fluids or another suitable solvent. Rubber surfaces should be roughened with sandpaper, then wiped with Dow Corning OS Fluids or another suitable solvent. Follow all precautions given on the solvent container label.

      For stronger, more uniform bonds, apply a thin film of Dow Corning® 1200 Prime Coat or Dow Corning® P5200 Adhesion Promoter to all surfaces except rubber and silicone rubber. Allow to air-dry for 30 to 45 minutes at room temperature. (Full instructions are provided with the prime coat.)

      Note: Dow Corning 1200 Prime Coat or Dow Corning P5200 Adhesion Promoter are flammable and are not suitable for use in food contact applications. Keep away from heat, sparks and open flames. Use only with adequate ventilation.

    2. Application

      Dow Corning 736 Heat Resistant Sealant is supplied ready to use. Under pressure, it flows readily from its container. The paste-like consistency makes it easy to work

      a spatula or wooden paddle can be used for tooling the surface.

      Apply Dow Corning 736 Heat Resistant Sealant to the prepared surface in a uniform thickness. In those cases where the sealant is to be used between two surfaces, put the second surface in place, using enough pressure to displace the air but not the sealant.

    3. Curing

      Cure time is affected by relative humidity, degree of confinement and cross-sectional thickness of the sealant. Sections up to 3-mm [1/8-inch] thick become rubbery solids in about 24 hours at 25°C (77°F) and 50 percent relative humidity. Less moisture content reduces the time required slightly. In 24 hours, sections up to 3-mm [1/8-inch] thick cure to a rubber.

      In applications where Dow Corning 736 Heat Resistant Sealant may be partially or totally confined during cure, the time required for proper cure is generally lengthened by the degree of confinement. 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 confinement during cure should be thoroughly tested before use. Curing time increases with the thickness of the sealant.

      NOTE: The odor given off during cure is due to the liberation of acetic acid. This odor disappears as the cure progresses and is not detectable after the cure is complete.

    4. Testing

      On some plastics

      may cause stress cracks

      test before use

  • Comparable Materials for Dow 736 Heat Resistant Sealant

    *See Terms of Use Below

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C Exposed to air, 25°C (77°F) and 50 percent RH
25°C Exposed to air, 25°C 77°F and 50 percent RH, 3-mm [1/8-inch] thickness
25°C After 72 hours at 25°C (77°F) and 50 percent RH
Cure Time Test Methods
Cure Time Test Method
1,440 min Exposed to air, 25°C 77°F and 50 percent RH, 3-mm [1/8-inch] thickness
4,320 min After 72 hours at 25°C (77°F) and 50 percent RH
Tack Free Time Test Methods
Tack Free Time Tack Free Temperature Test Method
17 min 25°C Exposed to air, 25°C 77°F and 50 percent RH
Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
10 min Exposed to air, 25°C 77°F and 50 percent RH 25°C
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity
350 psi 4,320 min 25°C 50(%) RH
Elongation Test Methods
Elongation Test Method
600 % As Cured - After 72 hours at 25°C (77°F) and 50 percent RH
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
26 As Cured - After 72 hours at 25°C (77°F) and 50 percent RH 25°C