Dow Sylgard 184 Silicone Elastomer

Dow Sylgard 184 Silicone Elastomer Datasheet
  • Description for Dow Sylgard 184 Silicone Elastomer

    Two part; 10:1 mix; minimal shrinkage; no exotherm during cure; no solvents or cure byproducts; deep section cure; repairable; good dielectric properties; flexible elastomer.

    *See Terms of Use Below

    Brand Sylgard
    Application Type Pot , Adhesive, Encapsulate
    1 Part or 2 Part 2 Part
    Material Form Liquid, Silicone elastomer
    Industry Amplifiers, Connectors, Relays, High voltage resistor packs, Sensors, Transformers, Solar cells, E-Mobility Solutions, Smart Meters, Smart Home Devices, Electronics, Lead integrated circuit
    Manufacturer Dow
    Chemistry Silicone, Solvent-free, Silicone elastomer
    Cure Method Base/Curing Agent, Heat, Room Temperature Cure
    Cure Temperature (°C) 20 to 25, 100, 125, 150
    Viscosity (cPs) 3,500, Flowable
    Color Colorless
    Ozone Resistance Ozone resistance
    Chemical Resistance Good
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -45, -55
    Light Refractive Index (RI) Good, 1.4118, 1.4225, 1.4028, 1.3997
    Key Specifications UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: UL 94 V-1, Mil-Spec (United States Military Standard): I-81550C: MIL-I-81550C, Type II, QPL
  • Technical Data for Dow Sylgard 184 Silicone Elastomer

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
      • Part A Name - Base
      • Part B Name - Curing Agent
    • Material Form
      • Elastomer - Silicone elastomer
      • Liquid
    • Industry
      • E-Mobility Solutions
      • Electronics - Lead integrated circuit, Relays
      • Solar Energy - Solar cells
      • Amplifiers
      • Connectors
      • Voltage Resistors - High voltage resistor packs
      • Sensors
      • Transformers
      • Smart Meters
      • Smart Home Devices
      • Power Supplies
      • Industrial - Industrial controls
    • Chemistry
    • Application Method
      • Dispenser - Automated mixing, Dispensing equipment, Manual mixing
    • Cure Method
      • Room Temperature / Air Dry - Room Temperature Cure
      • Heat
      • 2-Part Cure - Base/Curing Agent
    • Color
      • Clear / Transparent - Colorless
    • Key Specifications
      • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: V-1 - UL 94 V-1
      • Mil-Spec (United States Military Standard): I-81550C: Type II, QPL - MIL-I-81550C, Type II, QPL
    • Brand
      • Sylgard
    Specifications
    Cure Specs
    Cure Temperature (°C) 20 to 25, 100, 125, 150 Test Method
    Viscosity (cPs) 3,500, Flowable
    Linear Shrinkage (%) Minimal shrinkage
    Mix Ratio 10:1 (by volume), 10:1 (by weight)
    Bond Strength
    Tensile Strength (psi) 980
    Material Resistance
    Ozone Resistance Ozone resistance
    Chemical Resistance Good
    UV Resistance UV resistance
    Environmental Resistance Environmental resistance
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -45, -55
    Moisture/Humidity Resistance Moisture/humidity resistance
    Conductivity
    Dissipation Factor 0.00257, 0.00133 Test Method
    Dielectric Strength (V/mil) Good, Durable
    Dielectric Constant 2.72, 2.68 Test Method
    Thermal Conductivity (W/m°K) 0.27
    Volume Resistivity (O) 2.9e14(ohms/cm)
    Hardness
    Shore D Hardness 43 Test Method
    Flexibility Flexible
    Other Properties
    Light Refractive Index (RI) Good, 1.4118, 1.4225, 1.4028, 1.3997 Test Method
    Specific Gravity 1.030
    Coefficient of Thermal Expansion (CTE) 340 (Linear (micron/m °C or ppm ))
    Flash Point (°F) 213.8
    Business Information
    Shelf Life Details Shelf life is indicated by the “Use Before” date found on the product label. Refer to the product label for storage temperature requirements.
    Shelf Life Temperature (°F) 77
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 24
  • Best Practices for Dow Sylgard 184 Silicone Elastomer

    *See Terms of Use Below

    1. Surface Preparation

      In applications requiring adhesion, priming will be required for many of the silicone encapsulants. For best results, the primer should be applied in a very thin, uniform coating and then wiped off after application. After application, it should be thoroughly cured prior to application of the silicone elastomer. Additional instructions for primer usage can be found in the information sheets specific to the individual primers.

    2. Mixing

      The 10 to 1 mix ratio these products are supplied in gives one latitude to tune the modulus and hardness for specific application needs and production lines. In most cases de-airing is not required.

    3. Deairing/Degassing

      If air bubbles are still present, vacuum deairing may be required. Deair in a container with at least four times the liquid volume to allow for expansion of material. Air entrapped in the mixture can be removed by using a vacuum of 28 to 30 inches Hg. Continue the vacuum until the liquid expands and settles to its original volume and bubbling subsides. This may take 15 minutes to 2 hours depending on the amount of air introduced during stirring. For best curing results, glassware and glass or metal stirring implements should be used. Mix with a smooth action that does not introduce excess air.

    4. Testing

      If a substrate or material is questionable with respect to potentially causing inhibition of cure, it is recommended that a small scale compatibility test be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure.

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    *See Terms of Use Below

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
20 to 25°C These data were collected on 50-100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confrm adequate cure for your application, For primerless adhesion products, cure time is based on time to reach durometer. Full adhesion may take more time at the cure temperature.
100°C These data were collected on 50-100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confrm adequate cure for your application, For primerless adhesion products, cure time is based on time to reach durometer. Full adhesion may take more time at the cure temperature.
125°C These data were collected on 50-100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confrm adequate cure for your application, For primerless adhesion products, cure time is based on time to reach durometer. Full adhesion may take more time at the cure temperature.
150°C These data were collected on 50-100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confrm adequate cure for your application, For primerless adhesion products, cure time is based on time to reach durometer. Full adhesion may take more time at the cure temperature.
Cure Time Test Methods
Cure Time Test Method
Work / Pot Time Test Methods
Work / Pot Time Temperature
Dielectric Constant Test Methods
Dielectric Constant Test Method
2.72 Dielectric constant, 100 Hz
2.68 Dielectric constant, 100 KHz
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.00257 Dissipation factor, 100 Hz
0.00133 Dissipation factor, 100 KHz
Shore D Hardness Test Methods
Shore D Hardness Shore Hardness Test Method
43 Durometer
Light Refractive Index (RI) Test Methods
Light Refractive Index (RI) Test Method
Good
1.4118 @ 589 nm
1.4225 @ 632.8 nm
1.4028 @1321 nm
1.3997 @ 1554 nm