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Description for Dow 3120 RTV Silicone Rubber w/ 4 Catalyst 200:1
Low tear strength, high durometer, excellent heat stability.Application Type Mold-Making, Pot, Encapsulate 1 Part or 2 Part 2 Part Material Form Liquid Substrate Aluminum foil, Metal, Paper, Plastic, Polyesters Industry Electrical, Printed circuit boards, Transformers, Coils, Electronic Manufacturer Dow Chemistry Silicone rubber surfaces Cure Method Base/Catalyst Cure Temperature (°C) 20 to 25 Cure Time (min) 30 Viscosity (cPs) 28,000, Pourable Color Red High Temperature Resistance (°C) 300 Low Temperature Resistance (°C) -55 Other Resistance Radiation Key Specifications Mil-Spec (United States Military Standard): MIL-S-23586
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
---|---|
20 to 25°C |
Cure Time Test Methods
Cure Time | Test Method |
---|---|
30 min |
Viscosity Test Methods
Viscosity | Test Method | Temperature |
---|---|---|
28,000 cPs | ASTM D 1084B | 25°C |
Pourable |
Tensile Strength Test Methods
Tensile Strength | Test Method |
---|---|
900 psi | ASTM D 412, Die (C) |
Dielectric Constant Test Methods
Dielectric Constant | Temperature | Test Method |
---|---|---|
4.19 | 25°C | Dielectric constant, 100 Hz, ASTM D 150, Using Dow Corning RTV Catalyst F or S at 10:1 base to catalyst ratio. Wide departures from normal 10:1 ratio may slightly alter physical properties such as hardness and elongation |
3.54 | 25°C | Dielectric constant, 100 KHz, ASTM D 150, Using Dow Corning RTV Catalyst F or S at 10:1 base to catalyst ratio. Wide departures from normal 10:1 ratio may slightly alter physical properties such as hardness and elongation |
Dielectric Strength Test Methods
Dielectric Strength | Test Method |
---|---|
Good | Dielectric Strength Test Method |
457 V/mil | ASTM D 149, Using Dow Corning RTV Catalyst F or S at 10:1 base to catalyst ratio. Wide departures from normal 10:1 ratio may slightly alter physical properties such as hardness and elongation., 1/16” sample |
Dissipation Factor Test Methods
Dissipation Factor | Temperature | Test Method |
---|---|---|
0.07000 | 25°C | Dissipation factor, 100 Hz, ASTM D 150, Using Dow Corning RTV Catalyst F or S at 10:1 base to catalyst ratio. Wide departures from normal 10:1 ratio may slightly alter physical properties such as hardness and elongation. |
0.01700 | 25°C | Dissipation factor, 100 KHz, ASTM D 150, Using Dow Corning RTV Catalyst F or S at 10:1 base to catalyst ratio. Wide departures from normal 10:1 ratio may slightly alter physical properties such as hardness and elongation. |
Thermal Conductivity Test Methods
Thermal Conductivity | Temperature | Test Method |
---|---|---|
0.31 W/m°K | 25 to 100°C | ASTM D 2214 |
Volume Resistivity Test Methods
Volume Resistivity | Test Method |
---|---|
2.7e13 (ohms/cm) | ASTM D 257, Using Dow Corning RTV Catalyst F or S at 10:1 base to catalyst ratio. Wide departures from normal 10:1 ratio may slightly alter physical properties such as hardness and elongation. |
Elongation Test Methods
Elongation | Test Method |
---|---|
1 % | ASTM D 412 |
Shore A Hardness Test Methods
Shore A Hardness | Shore Hardness Test Method |
---|---|
60 | ASTM D 2240 |
Specific Gravity Test Methods
Specific Gravity | Temperature | Test Method |
---|---|---|
1.450 | 25°C | ASTM D 792A |

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