• Description for Dow Firestop 3-6548 Silicone RTV Foam

    Forms complex, irregular shapes; long service life; resistant to ozone, ultra-violet radiation and temperature extremes; up to a 4 hour fire rating can be achieved.

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    Application Type Coat, Seal
    1 Part or 2 Part 2 Part
    Material Form Liquid
    Industry Power Supplies: Battery Packs: Housing and Assembly
    Manufacturer Dow
    Chemistry Silicone
    Cure Method Part A/Part B
    Cure Temperature (°C) 20 to 25
    Color Dark gray-black, Dark gray-black
    Other Resistance Reversion
    Density (g/cm³) Medium, 0.220 to 0.320
  • Technical Data

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  • Best Practices

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Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
1.00 to 2.00 min CTM 092A,One part A thoroughly mixed with one part B and cured at 25°C 77°F for 24 hours.,Time to nonpour condition. Also, time to begin foam rise., Standard procedures for measuring snap time and free foam density are available from Dow Corning. Totally unconfined, density values as low as 0.22 g/cm3 14 lb/ft3 may be obtained. Values shown are typical for field installation 25°C
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Test Method
33 psi 1,440 min 25°C ASTM D 3574, One part A thoroughly mixed with one part B and cured at 25°C (77°F) for 24 hours.,Other: Testing on what we believe to be a representative lot of material. Testing is not done on a lot-by-lot basis. If property is critical for your application, you should test on a lot-by-lot basis prior to use.
Dielectric Constant Test Methods
Dielectric Constant Test Method
1.95 (100 Hz), CTM 0112, Cured foam sample thickness of 0.317 cm (0.125 inch).
Dielectric Strength Test Methods
Dielectric Strength Test Method
165 V/mil CTM 0114, Cured foam sample thickness of 0.317 cm (0.125 inch).
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.00505 (100 Hz), CTM 0112, Cured foam sample thickness of 0.317 cm (0.125 inch).
Thermal Conductivity Test Methods
Thermal Conductivity Test Method
0.41 W/m°K CTM 069, Cenco Fitch method.
Volume Resistivity Test Methods
Volume Resistivity Test Method
2.24e15 (ohms/cm) CTM 0249, Cured foam sample thickness of 0.317 cm (0.125 inch).
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Temperature (°C) CTE Test Method
1.78e-4 (in./ in/°F) -25 to 150°C CTM 0585, One part A thoroughly mixed with one part B and cured at 25°C (77°F) for 24 hours.
Density Test Methods
Density Test Method
0.220 to 0.320 g/cm³ CTM 0812, Power mixed for 30 seconds and cured in nonconfined condition.
Specific Gravity Test Methods
Specific Gravity Temperature Test Method
1.050 to 1.110 25°C CTM 0097