HRS - Heat Resistant Sealant 1300°C

High-temperature sealant with enhanced fire protection up to 1300°C

VITCAS HRS Heat Resistant Sealant is a high-performance sealing compound engineered to maintain bond strength under extreme thermal conditions. Formulated as a caulking-grade paste, it provides reliable sealing and jointing for ceramics, metals, silica-based materials and glass. With a temperature resistance of up to 1300°C / 2370°F, it ensures long-term stability and effective fire protection in both industrial and domestic applications.

Key Characteristics

• High-temperature resistance up to 1300°C / 2370°F, suitable for continuous use in extreme thermal environments.
• Caulking-grade paste formulation enabling accurate and controlled application.
• Forms a robust, durable bond on a wide range of refractory and high-temperature substrates.
• Excellent resistance to thermal cycling and thermal shock, preventing cracking or failure during repeated heating.
• Easy to apply and finish, requiring minimal surface preparation.
• Long-lasting performance, maintaining mechanical integrity under demanding operating conditions.
• Compatible with ceramics, metals, silica-based materials and glass, ensuring broad industrial versatility.
• Provides effective fire protection, contributing to safety in high-risk installations.
• Fire safety certified according to EN 45545-2:2020, meeting requirement sets R22 and R23 for hazard levels HL1, HL2 and HL3.

Uses

• Metal-to-metal sealing: Ideal for joints exposed to extreme thermal expansion and contraction.
• Glass bonding: Maintains a stable bond on glass components subjected to high temperatures.
• Ceramic and pottery repairs: Suitable for filling cracks or chips prior to refiring or glazing.
• Sealing silica-based materials: Effective for firebricks, refractory tiles, and other siliceous substrates.
• General industrial and domestic high-temperature use: Fireplaces, stoves, kilns, furnaces, ovens, and thermal processing equipment.

Industry Applications

• Railway and rolling stock manufacturing – Fully compliant with EN 45545-2 R22/R23 (HL1–HL3), suitable for sealing and fire protection in train interiors, engine compartments, HVAC housings, and electrical enclosures.
• Public transport systems – For use in trams, metros, and light-rail vehicles requiring low-smoke, low-toxicity materials.
• Railway infrastructure – Fire-resistant sealing of signalling cabinets, trackside housings, cable ducts, and safety-critical electrical systems.
• Aerospace and defence support equipment – For ground-support and maintenance systems where rail-grade fire certification is advantageous.
• Industrial enclosures and electrical installations – Suitable for switchgear, power modules, control panels, and thermal housings requiring certified fire-safety materials.
• High-risk industrial facilities – Furnaces, process equipment, energy plants, and heat-treatment systems requiring validated fire-performance sealing.
• Marine and offshore auxiliary zones – For exhaust housings, machinery rooms and non-structural sealing where low smoke and flame-spread properties are desirable.
• HVAC systems in transport and public buildings – High-temperature joints where flame retardancy must meet transport-grade standards.

Instructions

1. Ensure the surface is clean and free from dust, rust, grease and contaminants.
2. Cut the cartridge tip, attach the nozzle, and trim it to the desired bead size.
3. Apply using a cartridge gun, aiming for a joint thickness of 2–3 mm.
4. The sealant sets at room temperature; curing is accelerated by gradually applying heat for approximately four hours.
5. Once cured, the sealant can be sanded and over-painted.