Product Introduction
Momentive SNAPSIL™ RTV123 is a one-component, thixotropic silicone adhesive sealant designed for sealing, bonding dissimilar substrates, electrical insulation, and formed-in-place gasket applications. It cures to a resilient silicone rubber at room temperature when exposed to moisture. RTV123 provides primerless adhesion to many metals, rigid plastics, and glass while delivering low-odor cure characteristics and non-corrosive performance on aluminum and steel per MIL-A-46146A. It maintains flexibility and performance across wide temperature ranges.
Momentive SNAPSIL™ RTV123 Features
- Primerless adhesion to many metals, rigid plastics, and glass*
- Non-corrosive to aluminum and steel per MIL-A-46146A+
- Lower odor cure chemistry compared to acetoxy systems
- One-component, moisture-curing formulation
- Excellent electrical insulation properties
- Temperature resistance from –60°C to 204°C, with short-term resistance to 260°C
- Superior chemical, ozone, and weather resistance
- UL Recognized under File No. E-36952
Momentive SNAPSIL™ RTV123 Applications
- Sealing vertical joints and structural seams
- Bonding dissimilar materials such as metal-to-plastic or glass-to-aluminum
- Electrical insulation and protection of wires, terminals, and components
- Formed-in-place gasketing
- General sealing and bonding tasks requiring non-corrosive silicone
- Durable sealing in weather and chemical exposure environments
*Not recommended for polycarbonate due to potential crazing caused by ammonia by-products.
+May discolor copper and brass.
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 |
|---|---|
| Color | RTV122: White; RTV123: Black; RTV128: Translucent |
| Consistency | Thixotropic Paste |
| Specific Gravity | 1.04 |
| Application Rate | 500 g/min |
| Tack-Free Time | 20 minutes |
| Cure Through Time | 24 hours |
| Hardness (Shore A) | 30 |
| Tensile Strength | 1.72 MPa (250 psi) |
| Elongation | 350% |
| Tear Strength | 6.1 kN/m (35 lb/in) |
| Peel Strength | 7.0 kN/m (40 lb/in) |
| Dielectric Strength | 20 kV/mm |
| Dielectric Constant | 2.8 |
| Dissipation Factor | 0.0016 |
| Volume Resistivity | 4 × 10¹⁵ ohm-cm |
| Brittle Point | -60°C (-75°F) |
| Thermal Conductivity | 0.21 W/mK |
| Coefficient of Expansion | 27 × 10⁻⁵ cm/cm°C |
