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
RTV silicone sealant (Room Temperature Vulcanizing silicone) is a one-component sealant that cures at room temperature to form a flexible, heat-resistant rubber seal.
High temperature RTV silicone like Supex 280 is specially designed to withstand extreme heat, vibration, oil exposure, and pressure in demanding automotive and industrial environments.
It is widely used in:
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Supex 280 High Temperature RTV is widely used in automotive engine assembly and maintenance.
Typical automotive uses include:
Supex 280 silicone sealant is ideal for heavy-duty industrial sealing applications where high heat resistance is required.
Industrial uses include:
| Feature | High Temperature Silicone | Standard Silicone |
|---|---|---|
| Heat Resistance | Up to 300°C | Up to 150–200°C |
| Use | Engines, furnaces | Bathrooms, plumbing |
| Durability | Heavy-duty | Medium-duty |
| Oil Resistance | High | Low |
Request Technical Data Sheet ( TDS)
Supex 280 silicone sealant is used for sealing joints, gaskets, flanges, and components in automotive and industrial equipment.
High temperature RTV silicone like Supex 280 can withstand temperatures up to 300°C, making it suitable for engine and industrial applications.
Yes, Supex 280 silicone sealant is commonly used as a gasket maker in automotive engines and machinery.
Most RTV silicone sealants fully cure within 24 hours, depending on humidity and thickness.
Yes, RTV silicone sealant forms a waterproof and weather-resistant seal after curing.
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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