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Description for Dow Dowsil SE 9187 L Adhesive
One-part, black, clear (translucent) or white, fast tack-free, controlled volatility adhesive with very low viscosity.Brand Dowsil Application Type Adhesive, Potting, Conformal coating 1 Part or 2 Part 1-Part Material Form Liquid, Silicone elastomer Substrate Cceramic, Glass, Many reactive metals, Selected plastics Industry Rigid circuit boards, Sensors, PCB protection, Connectors, Smart Meters, E-Mobility Solutions, Smart Home Devices, Display module assembly, Headlamp assemblies, Electronic components, Flexible circuit boards, Relays Manufacturer Dow Chemistry Polydimethylsiloxane, Silicone elastomer, Solvent-free Cure Method RTV, Moisture, Room temperature cure Cure Temperature (°C) 20 to 25 Room Temperature Viscosity (cPs) Very low, 1,100, Controlled, Excellent flow, Self-leveling Color Black, White, Translucent High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Volume Resistivity (O) 3.0E+15 (ohms/cm) Key Specifications UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94HB (black only) -
Technical Data for Dow Dowsil SE 9187 L Adhesive
Overview
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Application Type
- Conformal Coating
- Adhesive
- Pottant / Encapsulant - Potting
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1 Part or 2 Part
- 1-Part
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Material Form
- Elastomer - Silicone elastomer
- Liquid
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Industry
- Smart Meters
- Smart Home Devices
- Electronic Displays - Display module assembly
- E-Mobility Solutions
- Headlamp - Headlamp assemblies
- Electronics - Electronic components, Flexible circuit boards, Relays, Rigid circuit boards
- Sensors
- Printed Circuit Board (PCB) - PCB protection
- Connectors
- Industrial - CD, DVD, HDD
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Chemistry
- Solvent-Free
- Other - Polydimethylsiloxane
- Silicone - Silicone elastomer
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Application Method
- Dispenser - Automated or manual needle dispensing systems
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Cure Method
- Room Temperature / Air Dry - Room temperature cure
- Moisture / Condensation Cure - Moisture
- RTV (Room Temperature Vulcanization) - RTV
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Color
- Translucent
- Black
- White
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Key Specifications
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : UL 94 HB - UL 94HB (black only)
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Brand
- Dowsil
Specifications
Cure Specs
Cure Temperature (°C) 20 to 25 Room Temperature Viscosity (cPs) Very low, 1,100, Controlled, Excellent flow, Self-leveling Tack Free Time (min) Fast, 8 Test Method Work / Pot Time (min) >86,400 Test Method Bond Strength
Shear Strength (psi) 40 Test Method Tensile Strength (psi) 65 Material Resistance
Flame Resistance Good flame resistance Environmental Resistance Environmental resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Conductivity
Dissipation Factor 0.00090 Test Method Dielectric Strength (V/mil) 500 Dielectric Constant 2.80 Test Method Volume Resistivity (O) 3.0E+15 (ohms/cm) Hardness
Shore A Hardness 17 Elongation (%) 160 Flexibility Soft Other Properties
Specific Gravity 1.000 Test Method Business Information
Shelf Life Details For best results, Dow Corning RTV adhesives should be stored at or below the storage temperature listed on the product label. Special precautions must be taken to prevent moisture from contacting these materials. Containers should be kept tightly closed with head or air space minimized. Partially filled containers should be purged with dry air or other gases, such as nitrogen. Shelf life is indicated by the “Use Before” date found on the product label. Shelf Life Temperature (°F) 90 Shelf Life Type from date of manufacture Shelf Life (mon) 12 Not Good For
Don't Use With Non-reactive metal, Non-reactive plastic, Teflon, Polyethylene, Polypropylene, Plastic substrates, Rubber substrates, Highly plasticized -
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Best Practices for Dow Dowsil SE 9187 L Adhesive
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Surface Preparation
All surfaces should be thoroughly cleaned and/or degreased with Dow OS fluids, naphtha, mineral spirits, methyl ethyl ketone (MEK) or other suitable solvent. Solvents such as acetone or isopropyl alcohol (IPA) do not tend to remove oils well, and any oils remaining on the surface may interfere with adhesion. Light surface abrasion is recommended whenever possible, because it promotes good cleaning and increases the surface area for bonding. A final surface wipe with acetone or IPA is also useful. Some cleaning techniques may provide better results than others
users should determine the best techniques for their particular applications.
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Testing
Due to the wide variety of substrate types and differences in substrate surface conditions, general statements on adhesion and bond strength are impossible. To ensure maximum bond strength on a particular substrate, 100 percent cohesive failure of the adhesive in a lap shear or similar adhesive strength test is desired. This ensures compatibility of the adhesive with the substrate being considered. Also, this test can be used to determine minimum cure time or can detect the presence of surface contaminants such as mold release agents, oils, greases and oxide films.
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Tack Free Time Test Methods
Tack Free Time | Tack Free Temperature |
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Fast | |
8 min | 25°C |
Work / Pot Time Test Methods
Work / Pot Time | Temperature |
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>86,400 min | <29°C |
Shear Strength Test Methods
Shear Strength | Type | Substrate | Test Method |
---|---|---|---|
40 psi | Lap shear strength | Glass | Unprimed Adhesion |
Dielectric Constant Test Methods
Dielectric Constant | Test Method |
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2.80 | 1 MHz |
Dissipation Factor Test Methods
Dissipation Factor | Test Method |
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0.00090 | 1 MHz |
Specific Gravity Test Methods
Specific Gravity | Test Method |
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1.000 | Cured |