Snapsil RTV128 is a one-component, ready-to-use adhesive sealant. It cures to a tough, resilient silicone rubber upon exposure to atmospheric moisture at room temperature. This formulation provides robust bonding and sealing solutions across diverse industrial applications.
General Information of Snapsil RTV128
Snapsil RTV128 is a high-performance, one-component silicone adhesive sealant. It cures at room temperature through a moisture-activated process. This reaction releases alcohol and residual ammonia as by-products, forming a durable, elastomeric bond. Consequently, it offers a lower odor cure compared to traditional acetoxy silicone sealants. The material maintains a thixotropic paste consistency, ensuring easy application and precise placement.
Furthermore, this sealant provides primerless adhesion to many common industrial substrates. It is specifically engineered to be non-corrosive to aluminum and steel, adhering to MIL-A-46146A standards. However, users should note its potential to discolor sensitive metals like copper and brass. Its UL Recognition (File No. E-36952) further validates its reliability and safety for electrical applications. This product retains its elastomeric properties across a wide temperature range, from -60ºC to 204ºC for extended periods, and up to 260ºC for short durations. It also exhibits excellent weatherability, ozone, and chemical resistance, ensuring long-term performance in harsh environments.
Key Features & Technical Benefits
- Primerless Adhesion: This feature allows direct bonding to many metals and rigid plastics, eliminating the need for additional primers. This streamlines manufacturing processes and reduces material costs.
- Non-Corrosive Cure: The sealant is specifically formulated to be non-corrosive to aluminum and steel. This protects sensitive metallic components from degradation, ensuring long-term assembly integrity.
- Superior Electrical Insulation: Snapsil RTV128 exhibits excellent dielectric strength and volume resistivity. These properties make it ideal for insulating electrical wires and terminals, enhancing system safety and reliability.
- Wide Temperature Stability: The cured material retains its elastomeric properties across a broad range, from -60ºC to 204ºC. This ensures consistent performance in challenging thermal environments.
Typical Industrial Applications
This formulation is engineered for the following applications:
- Sealing vertical joints in industrial assemblies.
- Bonding dissimilar materials, including metal to plastic and glass to aluminum.
- Electrical insulation for wires and terminals, enhancing safety and performance.
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 | Translucent |
| Consistency | Thixotropic Paste |
| Specific Gravity | 1.04 |
| Application Rate (3.2 mm orifice @ 621 kPa) | 500 gm/min |
| Tack Free Time | 20 minutes |
| Hardness, Shore A Durometer | 30 |
| Tensile Strength | 1.72 MPa (250 lb/in2) |
| Elongation | 350% |
| Dielectric Strength | 20 kv/mm (500 v/mil) |
| Brittle Point | -60°C (-75°F) |
| Thermal Conductivity | 0.21 W/mK (0.12 Btu.hr.ft2, °F ft) |
