Dow HV 1551/70P Datasheet Dow HV 1551/70P

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  • Description for Dow HV 1551/70P

    Low viscosity; sustained hydrophobicity; high tear strength; low cure temperature; good tracking resistance.

    *See Terms of Use Below

    Application Type Pot, Encapsulate
    1 Part or 2 Part 1-Part
    Material Form Liquid
    Manufacturer Dow
    Chemistry Silicone rubber
    Cure Method Pressure Sensitive, 2-Part Cure, Heat
    Cure Temperature (°C) Low, 120, 200, 120
    Cure Time (min) 10, 240, 0.13 to 0.23
    Viscosity (cPs) Low, 75000 (mPa.s)
    Other Resistance Tracking Resistance
    Volume Resistivity (O) 1.5e15 (ohms/cm)
  • Technical Data for Dow HV 1551/70P

    • Application Type
    • 1 Part or 2 Part
      • 1-Part
    • Material Form
      • Liquid
    • Chemistry
    • Cure Method
      • Pressure Sensitive (min) - Pressure Sensitive
      • Heat
      • 2-Part Cure
    Cure Specs
    Cure Temperature (°C) Low, 120, 200, 120 Test Method
    Cure Time (min) 10, 240, 0.13 to 0.23 Test Method
    Viscosity (cPs) Low, 75000 (mPa.s) Test Method
    Work / Pot Time (min) 4,320 Test Method
    Mix Ratio 1:1 (by volume)
    Bond Strength
    Tear Strength (piw) High, 28 (kN/m) Test Method
    Tensile Strength (psi) 5.5 (Mpa) Test Method
    Material Resistance
    Other Resistance Tracking Resistance
    Dissipation Factor 0.00060 Test Method
    Dielectric Strength (V/mil) 770 Test Method
    Dielectric Constant 2.70 Test Method
    Volume Resistivity (O) 1.5e15 (ohms/cm) Test Method
    Shore A Hardness 38 Test Method
    Elongation (%) 5 Test Method
    Other Properties
    Specific Gravity 1.090 Test Method
    Flash Point (°F) 212.0
    % Solids (%) 100
    Business Information
    Shelf Life Details When stored at or below 32°C (90°F) in the original unopened containers, this product has a usable life of 6 months from the date of production.;The curing agent and base can be sensitive to moisture or contaminants, it is recommended that containers are sealed tightly after use.
    Shelf Life Type from the date of production
    Shelf Life (mon) 6
  • Best Practices for Dow HV 1551/70P

    *See Terms of Use Below

    1. Mixing

      Mix parts A and B in a 1:1 ratio. Meter mix equipment which pumps, meters and mixes the two components without the incorporation of air is strongly recommended for production.

      Hand or mechanical mixing can be used but do not mix for an extended period of time or allow the temperature to exceed 35°C (95°F). It is very important to control the B to A ratio very precisely.

    2. Deairing/Degassing

      If air bubbles are entrapped during mixing the mixture must be thoroughly de-gassed under vacuum.

    3. Curing

      DOW CORNING HV 1551/70P cures rapidly at elevated temperatures. A 2mm cross-section requires 8-14 seconds at 120°C (248°F). The cure time depends on the thickness and the cure temperature used. Cure can be inhibited by contact with certain materials such as amines, sulphur and tin complexes.

    4. Clean-Up

      The uncured silicone can readily be removed by most hydrocarbon solvents. Polar solvents, such as ketones and alcohols, are not suitable.

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
120°C Press cured
200°C Post cured
Cure Time Test Methods
Cure Time Test Method
10 min Press cured
240 min Post cured
0.13 to 0.23 min
Viscosity Test Methods
Viscosity Test Method
75000 (mPa.s) Y=10.0sª¹, Viscosity measured on the Carrimed CSL Viscometer.
Work / Pot Time Test Methods
Work / Pot Time Temperature
4,320 min 25°C
Tear Strength Test Methods
Tear Strength Test Method
28 (kN/m) ASTM D624B
Tensile Strength Test Methods
Tensile Strength Test Method
5.5 (Mpa) ASTM D412
Dielectric Constant Test Methods
Dielectric Constant Test Method
2.70 IEC 60250, 100 MHz
Dielectric Strength Test Methods
Dielectric Strength Test Method
770 V/mil IEC 60243
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.00060 IEC 60250
Volume Resistivity Test Methods
Volume Resistivity Test Method
1.5e15 (ohms/cm) IEC 60093
Elongation Test Methods
Elongation Test Method
5 % ASTM D412
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method
38 ASTM D2204
Specific Gravity Test Methods
Specific Gravity Test Method
1.090 ASTM D792