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Description for Dow Dowsil 3-1595 Silicone Adhesive
One-part, gray, soft thixotropic adhesive with high elongation values and UV indicator for inspection, Heat cure.Brand Dowsil Application Type Bond, Sealing, Gasketing 1 Part or 2 Part 1-Part Material Form Liquid, Silicone elastomer Substrate Aluminum, ABS Industry Connector sealing, Lighting, Engine controllers Manufacturer Dow Chemistry Silicone elastomer, Silicone Cure Method Neutral cure, RTV, Moisture Cure Temperature (°C) 125, 150 Cure Time (min) 60, 30 Viscosity (cPs) 610,000 Color Gray High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 -
Technical Data for Dow Dowsil 3-1595 Silicone Adhesive
Overview
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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
- Lighting
- Other Transportation - Transmission
- Connectors - Connector sealing
- Industrial - Sealing housings, Sealing lids
- Engine - Engine controllers
- Construction - Attaching baseplates
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Chemistry
- Silicone - Silicone elastomer
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Application Method
- Dispenser - Automated or manual needle dispense
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Cure Method
- Moisture / Condensation Cure - Moisture
- RTV (Room Temperature Vulcanization) - RTV
- Other - Neutral cure
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Color
- Gray
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Brand
- Dowsil
Specifications
Cure Specs
Cure Temperature (°C) 125, 150 Test Method Cure Time (min) 60, 30 Test Method Viscosity (cPs) 610,000 Work / Pot Time (min) Long Test Method Thixotropic Soft thixotropic Bond Strength
Shear Strength (psi) 215 Test Method Tensile Strength (psi) 240 Material Resistance
Environmental Resistance Environmental resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Moisture/Humidity Resistance Moisture/humidity resistance Conductivity
Dielectric Strength (V/mil) Good, Durable dielectric insulation Hardness
Elongation (%) 800, High Shore OO Hardness 65 Flexibility Flexible Modulus (psi) Low Other Properties
Specific Gravity 1.060 Test Method Business Information
Shelf Life Details Shelf life is indicated by the “Use Before” date found on the product label. For best results, Dow Corning RTV adhesives should be stored at or below 25°C (77°F). 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 Type from date of manufacture Shelf Life (mon) 12 Not Good For
Don't Use With Plastic, Rubber -
Best Practices for Dow Dowsil 3-1595 Silicone 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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Mixing
No mixing required
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Deairing/Degassing
Automated airless dispense equipment can be used to reduce or avoid the need to de-air. If de-airing is required to reduce voids in the cured elastomer, consider a vacuum de-air schedule of >28 inches Hg for 10 minutes or until bubbling subsides.
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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, cohesive failure of the product in a lap shear or similar test is needed to ensure compatibility of the adhesive with the substrate being considered. Also, this test can be used to determine minimum cure time or to detect the presence of surface contaminants such as mold release agents, oils, greases and oxide films.
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
---|---|
125°C | Heat Cure |
150°C | Heat Cure |
Cure Time Test Methods
Cure Time | Test Method |
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60 min | Heat Cure |
30 min | Heat Cure |
Work / Pot Time Test Methods
Work / Pot Time | Temperature |
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Long |
Shear Strength Test Methods
Shear Strength | Type | Substrate | Test Method |
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215 psi | Lap shear strength | Aluminum | Unprimed Adhesion |
Specific Gravity Test Methods
Specific Gravity | Test Method |
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1.060 | Cured |