Dow 795 Silicone Building Sealant

Dow 795 Silicone Building Sealant Datasheet
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  • Description for Dow 795 Silicone Building Sealant

    Excellent weatherability; resistant to temperature extremes; excellent unprimed adhesion to a wide variety of construction materials; all temperature gunnability.

    *See Terms of Use Below

    Application Type Seal, Bond
    1 Part or 2 Part 1 Part
    Material Form Paste
    Substrate Coated aluminums, Non-porous, Porous, Glass, Anodized, Plastics, Steel, Alodined, Concrete, Painted aluminums, Painted metal, EIFS, Granite
    Manufacturer Dow
    Chemistry Silicone
    Cure Method Moisture
    Cure Temperature (°C) 25, 25
    Cure Time (min) 10,080 to 20,160, 30,240
    Viscosity (cPs) Non-sag, Slump
    Color Black, Blue spruce, Adobe tan, Gray: Aluminum, Stone, Limestone, Adobe tan, Adobe tan, White, Bronze, Charcoal, Blue spruce, Gray, Sandstone, Brick, Sandstone, Rustic brick, Limestone, Dusty rose, Rustic brick
    High Temperature Resistance (°C) 149
    Low Temperature Resistance (°C) -40
    Key Specifications ASTM (American Standard Test Method): ASTM Specification C 1184; ASTM Specification C 920 Type S, Grade NS, Class 50, Use NT, G, A and O, ASTM (American Standard Test Method): C 920: ASTM Specification C 1184; ASTM Specification C 920 Type S, Grade NS, Class 50, Use NT, G, A and O, CAN/CGSB (Canadian General Standards Board): Canadian Specification CAN2-19.13-M82, TT (U.S. Federal Specification): S-001543A: Federal Specification TT-S-001543A(COM-NBS) Class A; Federal Specification TT-S-00230C (COM-NBS) Class A, TT (U.S. Federal Specification): S-00230C: Federal Specification TT-S-001543A(COM-NBS) Class A; Federal Specification TT-S-00230C (COM-NBS) Class A

  • Technical Data for Dow 795 Silicone Building Sealant

    *See Terms of Use Below

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Paste
    • Substrate
      • Non-Porous Substrates - Non-porous
      • Porous Substrates - Porous
      • Concrete
      • Glass
      • Metal - Anodized, Painted metal
      • Aluminum - Coated aluminums, Painted aluminums
      • Steel
      • Plastic - Plastics
      • Stone - Alodined, EIFS, Granite
      • Other - Marble
    • Industry
    • Chemistry
    • Application Method
      • Dispenser - Air-operated guns, Bulk dispensing equipment
    • Cure Method
      • Moisture
    • Color
      • Black - Charcoal
      • Blue - Blue spruce
      • Brown - Adobe tan, Blue spruce, Rustic brick
      • Gray - Limestone, Stone
      • Gray: Aluminum
      • Off-White - Limestone, Sandstone
      • Orange - Adobe tan
      • Red - Adobe tan, Brick, Dusty rose, Rustic brick
      • White
      • Yellow - Bronze, Sandstone
    • Key Specifications
      • ASTM (American Standard Test Method): C 1184 - ASTM Specification C 1184; ASTM Specification C 920 Type S, Grade NS, Class 50, Use NT, G, A and O
      • ASTM (American Standard Test Method): C 920: Class 50 - ASTM Specification C 1184; ASTM Specification C 920 Type S, Grade NS, Class 50, Use NT, G, A and O
      • CAN/CGSB (Canadian General Standards Board): 19.13 - Canadian Specification CAN2-19.13-M82
      • TT (U.S. Federal Specification): S-001543A: Class A - Federal Specification TT-S-001543A(COM-NBS) Class A; Federal Specification TT-S-00230C (COM-NBS) Class A
      • TT (U.S. Federal Specification): S-00230C: Class A - Federal Specification TT-S-001543A(COM-NBS) Class A; Federal Specification TT-S-00230C (COM-NBS) Class A
    Specifications
    Cure Specs
    Cure Temperature (°C) 25, 25 Test Method
    Cure Time (min) 10,080 to 20,160, 30,240 Test Method
    Viscosity (cPs) Non-sag, Slump
    Tack Free Time (min) 180 Test Method
    Work / Pot Time (min) 20 to 30
    Bond Strength
    Peel Strength (piw) 32 (lb/in) Test Method
    Tensile Strength (psi) 45, 60, 35, 50 Test Method
    Material Resistance
    High Temperature Resistance (°C) 149
    Low Temperature Resistance (°C) -40
    Hardness
    Shore A Hardness 35 Test Method
    Flexibility Flexible
    Modulus (psi) Medium
    Business Information
    Shelf Life Details When stored at or below 27°C (80°F), Dow Corning 795 Silicone Building Sealant has a shelf life of 12 months from the date of manufacture. Refer to product packaging for “Use By Date.”
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 12
    Not Good For
    Don't Use With surfaces that are continuously immersed in water

  • Best Practices for Dow 795 Silicone Building Sealant

    *See Terms of Use Below

    1. Surface Preparation

      Clean all joints, removing all foreign matter and contaminants such as grease, oil, dust, water, frost, surface dirt, old sealants or glazing compounds and protective coatings.

    2. Application

      Install backing material or joint filler, setting blocks, spacer shims and tapes. Mask areas adjacent to joints to ensure neat sealant lines. Primer is generally not required on non-porous surfaces, but may be necessary for optimal sealing of certain porous surfaces. A test placement is always recommended. Apply Dow Corning 795 Silicone Building Sealant in a continuous operation using positive pressure. (The sealant can be applied using many types of air-operated guns and most types of bulk dispensing equipment.) Before a skin forms (typically within 15 minutes), tool the sealant with light pressure to spread the sealant against the backing material and joint surfaces. Remove masking tape as soon as the bead is tooled.

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C 25°C 77°F and 50% RH
25°C As Cured – After 21 days at 25°C (77°F) and 50% RH
Cure Time Test Methods
Cure Time Test Method
10,080 to 20,160 min 25°C 77°F and 50% RH
30,240 min As Cured – After 21 days at 25°C (77°F) and 50% RH
Tack Free Time Test Methods
Tack Free Time Test Method
180 min ASTM C 679, 50% RH
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
45 psi 30,240 min 25°C 50 (%) RH ASTM C 1135, at 25% Extension
60 psi 30,240 min 25°C 50 (%) RH ASTM C 1135, at 50% Extension
35 psi 30,240 min 25°C 50 (%) RH ASTM C 1135, As Cured – After 21 days at 25°C (77°F) and 50% RH followed by 10,000 hours in a QUV weatherometer, ASTM G 53
50 psi 30,240 min 25°C 50 (%) RH ASTM C 1135, As Cured – After 21 days at 25°C (77°F) and 50% RH followed by 10,000 hours in a QUV weatherometer, ASTM G 53
Peel Strength Test Methods
Peel Strength Cure Time Cure Temperature Cure Humidity Test Method
32 (lb/in) 30,240 min 25°C 50 (%) RH ASTM C 794, As Cured – After 21 days at 25°C (77°F) and 50% RH
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
35 ASTM D 2240, After 21 days at 25°C (77°F) and 50% RH 25°C
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