Product Introduction
INVISISIL™ RTV655 is a clear, two-component silicone rubber encapsulant engineered for exceptional performance in extreme low-temperature environments, maintaining flexibility down to -115°C. When mixed at a 10:1 ratio, it cures into a durable elastomer with strong electrical insulation properties, low viscosity flow, and excellent clarity. These characteristics make RTV655 ideal for electronic component protection and applications requiring optical visibility.
INVISISIL™ RTV655 Features
- Exceptional flexibility at temperatures down to -115°C
- Clear, colorless formulation for visual inspection
- Convenient 10:1 mix ratio
- Low viscosity for encapsulating complex geometries
- Heat-accelerated curing
- Deep-section curing without exotherm
- Hydrolytic stability and reversion-resistant
- High clarity for optical and identification applications
- Excellent electrical insulation
- Thermal stability up to 204°C
INVISISIL™ RTV655 Applications
- Low-temperature electronic encapsulation
- Solar cell potting requiring maximum light transmission
- Protection from shock, vibration, and moisture
- Deep-section potting and encapsulation
- Modules requiring transparent encapsulation for inspection
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| Property | Value |
|---|---|
| Mix Ratio (A:B) | 10:1 |
| Viscosity (RTV615) | 4000 cps |
| Viscosity (RTV655) | 5200 cps |
| Viscosity (RTV656) | 5000 cps |
| Work Time (25°C) | 4 hours |
| Hardness (Shore A) | 44–45 |
| Tensile Strength | 65 kg/cm² (920 psi) |
| Elongation | 100–120% |
| Shrinkage | 0.2% |
| Refractive Index (615) | 1.406 |
| Refractive Index (655/656) | 1.430 |
| Dielectric Strength | 19.7 kV/mm |
| Volume Resistivity | 1.2–1.8 × 10¹⁵ ohm-cm |
| Useful Temperature (RTV615) | -60 to +204°C |
| Useful Temperature (RTV655/656) | -115 to +204°C |
| Cure Time @ 25°C | 6–7 days |
| Cure Time @ 65°C | 4 hours |
| Cure Time @ 100°C | 1 hour |
| Cure Time @ 125°C | 45 minutes |
| Cure Time @ 150°C | 15 minutes |
