Dow 733 Glass & Metal Sealant Datasheet Dow 733 Glass & Metal Sealant

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  • Description for Dow 733 Glass & Metal Sealant

    One-part; non-slumping RTV paste, good resistance to weathering, moisture and temperature extremes; improved adhesion, especially to metals, plastics and glass; cures to a tough rubbery solid.

    *See Terms of Use Below

    Application Type Bond, Sealant
    1 Part or 2 Part 1 Part
    Material Form Paste
    Substrate Glass, Metals, Plastics, Matte Finish Steel, Stainless Steel
    Industry Marine, Recreational vehicles
    Manufacturer Dow
    Chemistry Silicone rubber
    Application Method Paddle, Spatula
    Cure Method Moisture
    Cure Temperature (°C) 25, 25, 25
    Cure Time (min) 1,440, 4,320, 2,880
    Viscosity (cPs) Non-sag, Non-slump, Controlled, NonFlow
    Color Black, Clear, White
    Ozone Resistance Good ozone resistance
    High Temperature Resistance (°C) 177, 204
    Low Temperature Resistance (°C) -57
    Durability Tough
    Key Specifications FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): FDA 21 CFR177.2600, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94 HB
  • Technical Data for Dow 733 Glass & Metal Sealant

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Paste
    • Substrate
    • Industry
      • Marine
      • Recreational Vehicles
      • Appliances - Freezer liners
    • Chemistry
    • Application Method
      • Spatula/Trowel - Paddle, Spatula
    • Cure Method
      • Moisture / Condensation Cure - Moisture
    • Color
      • Black
      • 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
      • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94 HB
    Specifications
    Cure Specs
    Cure Temperature (°C) 25, 25, 25 Test Method
    Cure Time (min) 1,440, 4,320, 2,880 Test Method
    Viscosity (cPs) Non-sag, Non-slump, Controlled, NonFlow
    Tack Free Time (min) 15 Test Method
    Bond Strength
    Peel Strength (piw) 20 (pli), 20 (pli), 21 (pli) Test Method
    Tensile Strength (psi) 335 Test Method
    Material Resistance
    Ozone Resistance Good ozone resistance
    Environmental Resistance Good
    High Temperature Resistance (°C) 177, 204
    Low Temperature Resistance (°C) -57
    Moisture/Humidity Resistance Good
    Vibration Resistance/Shock Resistance Vibration
    Hardness
    Durability Tough
    Shore A Hardness 25 Test Method
    Elongation (%) 500 Test Method
    Flexibility Flexible
    Other Properties
    Specific Gravity 1.030 Test Method
    Business Information
    Shelf Life Details Product should be stored at or below 32°C (90°F) in original, unopened containers. The most upto- date shelf life information can be found on the XIAMETER® Web site in the Product Detail page under Sales Specification.
    Shelf Life Temperature (°F) <90
    Shelf Life Type from date of manufacture
    Shelf Life (mon) 30
    Not Good For
    Don't Use With surfaces to be painted, On or near sensitive metals, concrete, masonry, some plastics
  • Best Practices for Dow 733 Glass & Metal Sealant

    *See Terms of Use Below

    1. Surface Preparation

      Thoroughly clean and degrease metal and plastic surfaces using Dow Corning® brand OS (ozone-safe) Fluid or other suitable solvent. Rubber surfaces should be roughened with sandpaper, then wiped with acetone. Follow precautions given on the solvent container label.

    2. Application

      Dow Corning 733 Glass & Metal Sealant is supplied in ready-to-use form. It extrudes readily from its container under pressure. The paste-like consistency makes it easy to work

      a spatula or paddle can be used to tool the surface.

    3. Curing

      Apply Dow Corning 733 Glass & Metal Sealant to the prepared surface in a uniform thickness. Then, let the unit stand undisturbed at room temperature to cure.

      Cure time is affected by relative humidity, degree of confinement and cross-sectional thickness of the sealant. Sections up to 1/8-inch thick become rubbery solids in about 24 hours at room temperature and 50 percent relative humidity. Less humidity increases cure time slightly.

      In applications where Dow Corning 733 Glass & Metal 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 that with absolute confinement, cure will not be completed. Every application involving confinement during cure should be thoroughly tested before use.

      Curing time increases with the thickness of the sealant. A 1/2-inch cross section, for example, may require 7 to 14 days for complete solidification at standard conditions. However, the cure will have penetrated the outer 1/8 inch in about 24 hours.

      An odor caused by the liberation of acetic acid is given off during cure. This odor disappears as the cure progresses and is not detectable after cure is complete.

    4. Testing

      On some plastics

      may cause stress cracks – test before use

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    *See Terms of Use Below

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C 25°(C) (77°F) and 50% RH, 3.18-mm thickness
25°C As Cured 3 Days at 25°C (77°F) and 50% RH, Measured on 1.91 mm-thick (0.075-inch) slabs.
25°C As Cured 2 Days at 25°C (77°F) and 50% RH
Cure Time Test Methods
Cure Time Test Method
1,440 min 25°(C) (77°F) and 50% RH, 3.18-mm thickness
4,320 min As Cured 3 Days at 25°C (77°F) and 50% RH, Measured on 1.91 mm-thick (0.075-inch) slabs.
2,880 min As Cured 2 Days at 25°C (77°F) and 50% RH
Tack Free Time Test Methods
Tack Free Time Tack Free Temperature Test Method
15 min 25°C 25°C 77°F and 50% RH
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
335 psi 4,320 min 25°C 50 % ASTM D 412, Measured on 1.91 mm-thick (0.075-inch) slabs.
Peel Strength Test Methods
Peel Strength Type Cure Time Cure Temperature Cure Humidity Substrate
20 (pli) 180° Peel strength 2,880 min 25°C 50 % Stainless steel
20 (pli) 180° Peel strength 2,880 min 25°C 50 % Matte finish steel
21 (pli) 180° Peel strength 2,880 min 25°C 50 % Aluminum
Elongation Test Methods
Elongation Test Method
500 % ASTM D 412, Measured on 1.91 mm-thick (0.075-inch) slabs., As Cured 3 Days at 25°C (77°F) and 50% RH
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
25 ASTM D 2240, Measured on 1.91 mm-thick (0.075-inch) slabs., As Cured 3 Days at 25°C (77°F) and 50% RH 25°C
Specific Gravity Test Methods
Specific Gravity Temperature
1.030 25°C