Product Introduction
Momentive Siltrust™ RTV 566 Silicone Rubber Compound is a two-part silicone system developed for applications that require exceptionally low outgassing performance in high-vacuum environments. The RTV566A base compound is supplied ready for use with the RTV566B curing agent, allowing room-temperature curing while offering reliable elastomeric performance over an extremely wide temperature range. With excellent release characteristics and strong adhesion when used with primer, this material is well-suited for aerospace, scientific, and high-temperature electronic applications.
Momentive Siltrust™ RTV 566 Silicone Rubber Compound Features
- Low outgassing characteristics suitable for high-vacuum environments
- Two-part system: RTV566A base and RTV566B curing agent
- Room-temperature cure capability
- Excellent release properties
- Strong adhesion when used with primer
- Retains elastomeric properties from -115°C (-175°F) to 260°C (500°F) continuously
- Withstands short-term exposure up to 316°C (600°F)
- RTV566A uncured viscosity: 42,700 cps
- Specific gravity: RTV566A = 1.49, RTV566B = 1.15
- Typical catalyzed properties (100:0.1 mix): 180 g/min application rate (45 minutes after mixing)
- Work life: 1.5 hours
- Tack-free time: 2.2 hours
- Shore A hardness: 61
- Tensile strength: 56 kg/cm² (800 psi)
- Elongation: 120%
- Lap shear strength on primed aluminum: 33 kg/cm² (465 psi)
- Volatile condensable material (VCM): 0.02% (ASTM E595)
- Total weight loss: 0.14% (ASTM E595)
Momentive Siltrust™ RTV 566 Silicone Rubber Compound Applications
- High-vacuum applications requiring low-outgassing materials
- Aerospace assemblies and scientific instrumentation
- Bonding and sealing applications requiring primer-enhanced adhesion
- Encapsulation of electrical and electronic components exposed to extreme temperatures
- Protective potting and coating for high-reliability environments
- Applications requiring short-term exposure to temperatures up to 316°C (600°F)
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 |
|---|---|
| Product Name | SILTRUST™ RTV566 |
| Type | Two-part low-outgassing silicone rubber compound |
| RTV566A Color | Red |
| RTV566B Color | Yellow-Brown |
| RTV566A Viscosity | 42,700 cps |
| RTV566A Specific Gravity | 1.49 |
| RTV566B Specific Gravity | 1.15 |
| Mix Ratio (A:B) | 100:0.1 by weight |
| Application Rate | 180 g/min (0.125 in orifice @ 90 psi) |
| Work Life | 1.5 hours |
| Tack-Free Time | 2.2 hours |
| Hardness | Shore A 61 |
| Tensile Strength | 56 kg/cm² (800 psi) |
| Elongation | 120% |
| Lap Shear Strength (primed Al) | 33 kg/cm² (465 psi) |
| Total Weight Loss (ASTM E595) | 0.14% |
| Volatile Condensable Material | 0.02% |
| Service Temperature Range | -115°C to 260°C continuous, 316°C short-term |
