Dow 888 Silicone Joint Sealant

Dow 888 Silicone Joint Sealant Datasheet
  • Description for Dow 888 Silicone Joint Sealant

    All temperature gunnability; seals irregular surfaces; unprimed adhesion; low modulus; good weatherability; fast cure.

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    Application Type Bond, Repair, Seal
    1 Part or 2 Part 1 Part
    Material Form Paste
    Substrate Portland cement concrete (PCC), Concrete, Portland cement concrete (PCC)
    Manufacturer Dow
    Chemistry Silicone
    Cure Method Moisture
    Cure Temperature (°C) 25, 25
    Cure Time (min) Fast, 10,080 to 20,160, >10,080
    Color Gray
    Key Specifications TT (U.S. Federal Specification): S-001543A: Meets and exceeds TT-S-001543A Class A(one-part silicone sealants); TT-S-00230C Class A (one-component sealants)
  • Technical Data for Dow 888 Silicone Joint Sealant

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Paste
    • Substrate
      • Concrete - Portland cement concrete (PCC)
      • Stone - Portland cement concrete (PCC)
      • Other - Irregular surfaces
    • Industry
    • Chemistry
    • Application Method
      • Dispenser - An air-powered pump
      • Brush - Hand
    • Cure Method
      • Moisture / Condensation Cure - Moisture
    • Color
      • Gray
    • Key Specifications
      • TT (U.S. Federal Specification): S-001543A: Class A - Meets and exceeds TT-S-001543A Class A(one-part silicone sealants); TT-S-00230C Class A (one-component sealants)
    Specifications
    Cure Specs
    Cure Temperature (°C) 25, 25 Test Method
    Cure Time (min) Fast, 10,080 to 20,160, >10,080 Test Method
    Tack Free Time (min) 60 Test Method
    Work / Pot Time (min) 0.17 Test Method
    Thixotropic Thixotropic
    Hardness
    Shore A Hardness 15 to 25 Test Method
    Elongation (%) 12 Test Method
    Flexibility Flexible, Resilient
    Modulus (psi) Low, 45 Test Method
    Other Properties
    Specific Gravity 1.450 to 1.515
    Business Information
    Shelf Life Details When stored in original, unopened containers between 0°C (32°F) and 32°C (90°F), Dow Corning 888 Silicone Joint Sealant has a shelf life of 12 months from date of manufacture.Keep containers tightly closed. Refer to product packaging for “Use By Date.”
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 12
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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C
25°C As Cured – after 7 days at 25°C (77°F) and 50 percent RH
Cure Time Test Methods
Cure Time Test Method
Fast
10,080 to 20,160 min
>10,080 min As Cured – after 7 days at 25°C (77°F) and 50 percent RH
Tack Free Time Test Methods
Tack Free Time Tack Free Temperature
60 min 25°C
Work / Pot Time Test Methods
Work / Pot Time Temperature
0.17 min 25°C
Elongation Test Methods
Elongation Test Method
12 % after 7 days at 25°C (77°F) and 50 percent RH
Modulus Test Methods
Modulus Test Method
Low Modulus Test Method
45 psi at 150 percent elongation, maximum, after 7 days at 25°C (77°F) and 50 percent RH
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
15 to 25 after 7 days at 25°C (77°F) and 50 percent RH 25°C