Welcome to Supex
Welcome to Supex
A high Temperature RTV Silicone Sealant is a single-component, room-temperature curing adhesive and sealant that withstands heat up to 300°C. It forms a tough, flexible, waterproof, and oil-resistant silicone rubber upon exposure to moisture. The red, non-sag formulation is ideal for use on both vertical and horizontal surfaces, making it suitable for high-temperature gasketing and sealing applications in automotive and industrial environments.
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100% Authentic products
25+ Years of expertise
Pan-India delivery
High Temperature RTV Silicone Sealant for Automotive & Industrial Applications
SUPEX 280 is a high-temperature RTV Silicone Sealant designed for sealing and bonding applications in automotive, industrial and engineering environments.
It is a one-component silicone sealant that cures at room temperature when exposed to moisture in the air. After curing, it forms a flexible and heat-resistant silicone rubber seal.
With a maximum operating temperature of up to 300°C, SUPEX 280 is suitable for heat-exposed components where the actual seal temperature remains within the recommended operating range.
Key Applications: Automotive Components • Industrial Machinery • Motors & Pumps • HVAC Equipment • Electrical Enclosures • Heating Equipment • Equipment Housings
SUPEX 280 is designed for applications that need reliable sealing under heat, vibration and temperature changes.
Unlike rigid sealing materials, silicone remains flexible after curing. This helps the seal accommodate movement caused by thermal expansion and contraction.
The RTV curing system also makes application simple. There is no need to mix two components before use.
Automotive components are exposed to heat, vibration, moisture and temperature changes. A flexible silicone sealant can help maintain a reliable seal as components expand and contract.
SUPEX 280 can be considered for automotive applications where the actual temperature at the seal remains within the 300°C operating limit.
Potential applications include:
SUPEX 280 is particularly useful where a flexible seal is required and the assembly may experience vibration or repeated temperature changes.
Industrial equipment often combines heat, vibration, metal components and repeated thermal cycles. SUPEX 280 provides a flexible sealing option for compatible components operating within its temperature range.
SUPEX 280 can be used for applications such as:
These applications can benefit from a sealant that remains flexible rather than becoming rigid after curing.
Motors, pumps and industrial machines can experience vibration and heat during operation.
SUPEX 280 can be used on compatible covers, housings and joints where the sealing surface stays within the recommended temperature range.
The flexible silicone seal can help accommodate small movements between mating components while providing protection against moisture and environmental exposure.
Heat generated by electrical and HVAC equipment can create demanding sealing conditions.
SUPEX 280 is suitable for selected applications such as:
Application suitability should always be confirmed based on the substrate, temperature, joint design and environmental conditions.
SUPEX 280 can be considered for use on compatible materials such as:
Surface compatibility can vary. For critical applications, testing on the actual substrate is recommended before production use.
An RTV Silicone Sealant is useful when an application needs flexibility, temperature resistance and simple processing.
SUPEX 280 offers several practical advantages:
One-component application: No mixing is required. The product is ready to apply.
Flexible sealing: The cured silicone remains flexible and can accommodate movement.
Heat resistance: Suitable for applications with operating temperatures up to 300°C, subject to the product’s technical specification.
Thermal cycling: Silicone can accommodate repeated expansion and contraction better than many rigid sealing materials.
Vibration resistance: The flexible cured seal can help maintain joint integrity in vibrating equipment.
Easy application: Apply the sealant to a clean, prepared surface and allow it to cure according to the recommended conditions.
Always follow the latest Technical Data Sheet (TDS) for specific application and curing requirements.
Automotive:
Engine-bay components, cooling-system housings, motor housings, electrical enclosures, sensors and thermal-management components.
Industrial:
Motors, pumps, compressors, machinery housings, electrical equipment, HVAC systems, heating equipment and industrial enclosures.
Equipment Manufacturing:
Covers, panels, flanges, housings and non-structural joints exposed to heat and vibration.
RTV stands for Room Temperature Vulcanizing. RTV silicone sealant cures at room temperature when exposed to moisture and forms a flexible silicone rubber seal.
SUPEX 280 is designed for applications with operating temperatures up to 300°C, subject to the product’s technical specification and application conditions.
Yes. It can be considered for compatible automotive components where the actual temperature at the seal remains within the specified operating range.
Applications with direct exposure to temperatures above 300°C should not be considered suitable. Actual joint temperature must be evaluated before selecting the product.
Yes. Potential applications include motor housings, pump housings, equipment covers, electrical enclosures, HVAC equipment and other heat-exposed industrial components.
Yes. RTV silicone forms a flexible and elastic cured material, making it suitable for joints exposed to movement and thermal expansion.
For automotive and industrial applications, SUPEX 280 provides a practical solution for flexible sealing in heat-exposed assemblies.
With up to 300°C operating temperature, one-component application and flexible silicone performance, it is suitable for compatible components where heat, vibration and thermal movement are part of the operating environment.
Choose SUPEX 280 for high-temperature sealing where flexibility and reliable joint protection matter.
Bonding and sealing of metals, ceramics, glass, and silicone rubber components
Gasket dressing and upgrading of conventional or pre-cut gaskets that fail at high temperatures
Formed-in-place gasket or sealant for replacing pre-formed gaskets in systems operating up to 300°C
Sealing and encapsulating heating elements in electrical appliances for continuous operation up to 280°C
Assembly and repair of industrial furnaces, ovens, boilers, exhaust stacks, and high-temperature ducting
Automotive gasketing applications such as valve covers, oil pans, water pumps, end seals, and rear axle housings
Bonding and repair of fabricated silicone gaskets and high-temperature components
Supex High Temperature RTV Silicone Sealant is ideal wherever heat, vibration, and chemical exposure demand a resilient, long-lasting seal.
| Property | Value |
|---|---|
| Chemical Base | Oxime cure silicone |
| Specific Gravity (ASTM D 1045–86) | 1.02 ± 0.03 g/cm³ |
| Extrusion (ISO 6927) | 400 g/min |
| Tack Free Time (25°C and 50% R.H.) | 20–30 min |
| Cure Rate (1 day) (25°C and 50% R.H.) | 3 mm |
| Modulus at 100% (MPa) (ASTM D412) | 0.4 MPa |
| Tensile Strength (ASTM D412) | 1.80 MPa |
| Elongation at Break (ASTM D412) | 500% |
| Shore Hardness | 22 Shore A |
| Weight | 0.5kg |
|---|---|
| Dimensions | 12 × 5 × 5 cm |
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