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Description for Dow Dowsil HC 1100 Conformal Coating
One-part, gray, fast, tack-free conformal coating with controlled volatility and medium viscosity, Solventless RTV elastomeric conformal coatings require atmospheric moisture to cure, needing no expensive ovens, and various viscosity versions facilitate different application methodsBrand Dowsil Chemical Resistance Good Application Type Conformal Coating 1 Part or 2 Part 1-Part Material Form Liquid, Silicone elastomer Industry Rigid circuit boards, Sensors, PCB systems assembly, Connectors, Smart Meters, E-Mobility Solutions, Smart Home Devices, CD, Spot protection on components, High tolerance devices , Electronic components, DVD, Flexible circuit boards, HDD, Relays Manufacturer Dow Chemistry Silicone elastomer, Solventless Cure Method RTV, Atmospheric moisture, Room Temperature Cure Cure Temperature (°C) 25 Room Temperature Cure Time (min) 30 Viscosity (cPs) Medium, 2,375 Color Gray, Translucent Ozone Resistance Ozone resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45 Volume Resistivity (O) 2E+15 (ohms/cm) Stress Relief Low stress -
Technical Data for Dow Dowsil HC 1100 Conformal Coating
Overview
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Chemical Resistance
- Chemical Resistance - Good
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Application Type
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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
- E-Mobility Solutions
- Electronics - Electronic components, Flexible circuit boards, Relays, Rigid circuit boards, CD, DVD, HDD, Spot protection on components, High tolerance devices
- Sensors
- Printed Circuit Board (PCB) - PCB systems assembly
- Connectors
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Chemistry
- Solvent-Free - Solventless
- Silicone - Silicone elastomer
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Application Method
- Brush
- Spray
- Flow
- Dip
- Other - Automated pattern coating
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Cure Method
- Room Temperature / Air Dry - Room Temperature Cure
- Moisture / Condensation Cure - Atmospheric moisture
- RTV (Room Temperature Vulcanization) - RTV
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Color
- Translucent
- Gray
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Brand
- Dowsil
Specifications
Cure Specs
Cure Temperature (°C) 25 Room Temperature Test Method Cure Time (min) 30 Test Method Viscosity (cPs) Medium, 2,375 Tack Free Time (min) Fast, 9 Test Method Work / Pot Time (min) >86,400 Test Method Bond Strength
General Bond Strength (psi) Good Tensile Strength (psi) 120 Material Resistance
Ozone Resistance Ozone resistance UV Resistance UV resistance Environmental Resistance Environmental resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45 Moisture/Humidity Resistance Moisture/humidity resistance Conductivity
Dissipation Factor 0.00300 Test Method Dielectric Strength (V/mil) Durable, 575 Dielectric Constant 3.20 Test Method Volume Resistivity (O) 2E+15 (ohms/cm) Hardness
Stress Relief Low stress Shore A Hardness 22 Test Method Elongation (%) 190 Flexibility Soft Modulus (psi) 60 Test Method Other Properties
Specific Gravity 1.080 Test Method Flash Point (°F) 143.6 % Solids (%) 100 Business Information
Shelf Life Details Storage conditions and shelf life (“Use by” date) are indicated on the product label., Special precautions must be taken to prevent moisture from contacting Dow Corning RTV Conformal Coatings. Containers should be kept tightly closed and 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., For best results, Dow Corning RTV Conformal Coatings 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 and 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 -
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Best Practices for Dow Dowsil HC 1100 Conformal Coating
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Curing
Time to cure is dependent on several variables including the method of application, film thickness, temperature and humidity. Tack-free time in the data table gives an indication of typical times until surface is dry enough to handle. Cure time for full cure are indications of time needed to develop full physical properties such as durometer, tensile strength or adhesion. These times, including full cure time, can be significantly improved by introducing mild heat of 60°C or less.
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Comparable Materials for Dow Dowsil HC 1100 Conformal Coating
Spec Engine® Results
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
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25°C Room Temperature | 50% RH, 0.3 mm |
Cure Time Test Methods
Cure Time | Test Method |
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30 min | 50% RH, 0.3 mm |
Tack Free Time Test Methods
Tack Free Time | Tack Free Temperature |
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Fast | |
9 min | 25°C |
Work / Pot Time Test Methods
Work / Pot Time | Temperature |
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>86,400 min | <29°C |
Dielectric Constant Test Methods
Dielectric Constant | Test Method |
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3.20 | At 1 MHz |
Dissipation Factor Test Methods
Dissipation Factor | Test Method |
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0.00300 | At 1 MHz |
Modulus Test Methods
Modulus | Test Method |
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60 psi | Tensile Modulus |
Shore A Hardness Test Methods
Shore A Hardness | Shore Hardness Test Method |
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22 | Durometer |
Specific Gravity Test Methods
Specific Gravity | Test Method |
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1.080 | Cured |

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