RTV615 silicone potting compound is a clear liquid that cures at room temperature to high strength silicone rubber with the addition of curing agents. These compounds are clear and colorless but differ in low-temperature flexibility. RTV615, RTV655, and RTV656 silicone potting compounds have been used for the protection of electronic components and assemblies against shock, vibration, moisture, ozone, dust, chemicals, and other environmental hazards by potting or encapsulation of the components and assemblies. The optical clarity of these silicone rubber compounds suggests evaluation for applications such as potting solar cells for maximum light transmission and electronic assemblies where component identification is necessary or desirable.
FEATURES:
- Convenient 10:1 mixing ratio for use in automatic dispensing or hand operations
- Low viscosity allows easy flow in and around complex parts, providing excellent electrical insulation and shock resistance
- Cure rate can be accelerated by heat
- Will cure in deep sections or enclosed assemblies without exotherm and with low shrinkage
- Chemical composition contains no solvents for ease of use on production lines
- Reversion resistance and hydrolytic stability permit use in high humidity environments at elevated temperatures
- Clarity permits visual inspection for easy identification and repair of encapsulated parts
- Retention of elastomeric properties at temperatures up to 204°C (400°F)
| UNCURED PROPERTIES | RTV615A | RTV615B |
| Color | Clear Colorless | Clear Colorless |
| Consistency | Easily Pourable | Easily Pourable |
| Viscosity, cps | 4300 | – |
| Specific Gravity | 1.02 | – |
| UNCURED PROPERTIES WITH CURING AGENT ADDED | ||
| Color | Clear, Colorless | |
| Consistency | Easily Pourable | |
| Viscosity, cps | 4000 | |
| Work Time @ 25°C (77°F), hrs | 4 | |
CURED PROPERTIES
| Hardness, Shore A Durometer | 44 |
| Tensile Strength, kg/cm2 (psi) | 65 (920) |
| Elongation, % | 120 |
| Shrinkage, % | 0.2 |
| Refractive Index | 1.406 |
| Dielectric Strength, kv/mm (v/mil) (1.9 mm thick) | 19.7 (500) |
| Dielectric Constant @ 1000 Hz | 2.7 |
| Dissipation Factor @ 1000 Hz | 0.0006 |
| Volume Resistivity, ohm-cm | 1.8 x 10^15 |