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Description for Dow 888 Silicone Joint Sealant
All temperature gunnability; seals irregular surfaces; unprimed adhesion; low modulus; good weatherability; fast cure.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
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Application Type
- Adhesive - Bond
- Repair & Maintenance - Repair
- Sealant - Seal
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1 Part or 2 Part
- 1-Part
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Material Form
- Paste
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Substrate
- Concrete - Portland cement concrete (PCC)
- Stone - Portland cement concrete (PCC)
- Other - Irregular surfaces
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Industry
- Other Transportation - Airport
- Industrial - Bridge joints
- Construction - Highway
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Chemistry
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Application Method
- Dispenser - An air-powered pump
- Brush - Hand
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Cure Method
- Moisture / Condensation Cure - Moisture
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Color
- Gray
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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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Best Practices for Dow 888 Silicone Joint Sealant
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Comparable Materials for Dow 888 Silicone Joint Sealant
Spec Engine® Results
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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 |