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Würth High-Temperature Silicone

Würth High-Temperature Silicone

0892330

24 in stock

Key Features

  • Special silicone sealant designed for joints and assemblies exposed to high thermal loads and chemical exposure.
  • Withstands continuous temperatures up to 250°C, and short term peaks up to 300°C (for 1.5 hours).
  • Excellent resistance to a wide range of chemicals, UV radiation, and ageing, ensuring long-term performance. 
  • Highly elastic formulation with 20% movement absorption and up to 250% elongation at break.
  • DIN 4102 Class B2 certified - classified as normally flammable in the cured state.
  • Suitable for chemically exposed joints (refer to resistance list).
  • Weather- and UV-resistant, ideal for both indoor and outdoor use in industrial environments.
  • Compatible with coating applications, but not paintable.
£20.99 GBP
£20.99 GBP
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Würth High-Temperature Silicone
Würth High-Temperature Silicone0892330
Würth High-Temperature Silicone0892330
£20.99/ea 		£0.00
£20.99/ea £0.00

Description

High-Performance Silicone Sealant for Extreme Heat Applications

Würth High-Temperature Silicone is a specially formulated acetoxy-curing sealant designed to provide exceptional thermal and chemical resistance for demanding industrial environments. It forms a durable, permanently elastic joint capable of withstanding extreme temperatures and mechanical stress, making it ideal for use in furnace, heating, and ventilation systems.

Exceptional Heat Resistance

This silicone compound remains stable under continuous heat exposure up to 250°C, and can tolerate short-term thermal peaks up to 300°C for 1.5 hours without degradation. Its high-temperature endurance makes it suitable for sealing components in furnaces, engines, boilers, dryers, and industrial heating equipment.

Durable and Weather-Resistant

The sealant is resistant to UV radiation, ageing, and atmospheric influences, ensuring reliable performance in both interior and exterior applications. Its elastic formulation absorbs vibration and movement, maintaining a secure, crack-free seal over time.

Excellent Chemical Resistance

Würth High-Temperature Silicone demonstrates strong resistance to industrial chemicals, oils, and solvents. It is ideal for use in environments where thermal and chemical stress occur simultaneously, such as industrial plants, HVAC units, and chemical processing systems.

Safe and Compliant

This sealant is classified under DIN 4102 Building Material Class B2 as normally flammable in the cured state. It is free of fungicidal additives and is suitable for use in non-sanitary applications such as industrial, mechanical, and heating system assembly.

Easy Application and Clean Curing

Supplied in a 310ml cartridge, Würth High-Temperature Silicone can be applied using a standard sealant gun. It cures through acetoxy (acidic) reaction, releasing a mild vinegar-like odour during curing, and forms a dense, elastic joint with high adhesion to metals, glass, and ceramics.

More Information

Application Instructions

  1. Ensure all surfaces are load-bearing, clean, dry, and free from grease, rust, and water.
  2. On porous materials, apply a suitable primer to improve adhesion.
  3. Cut the cartridge nozzle to the desired bead size and apply the sealant evenly to the joint.
  4. Smooth the surface with a suitable tool within the skin formation time (8-12) minutes.
  5. Allow curing under ambient conditions (23°C, 50% RH) - curing rate approx. 2 mm per day.
  6. Ensure adequate ventilation during curing; not that thicker layers will extend curing time.

Usage Notes:

  • Processing temperature: 5° to 40°C.
  • Temperature resistance: -50°C to 250°C (short term 300°C).
  • Not suitable for structural glazing or continuous immersion in water.
  • Not overpaintable.
  • Store at temperatures up to 25°C in a dry, shaded location. Shelf life 24 months from production.

Specifications

Chemical Basis: Acetoxy-curing silicone (sauer silicones)

Colour: Red-brown

Contents: 310 ml cartridge

Odour: Vinegar-like during curing

Density: 1.05 g/cm³

Skin Formation Time: 8–12 min (23 °C, 50% RH)

Curing Rate: 2 mm/day (23 °C, 50% RH)

Breaking Elongation: 350 %

Shore A Hardness: 30

Movement Absorption: 20 %

Processing Temperature: +5 °C to +40 °C

Temperature Resistance: -50 °C to +250 °C (short-term up to +300 °C)

Flashing Point: 250 °C

Building Material Class: B2 – Normally flammable (DIN 4102)

UV Resistance: Yes

Ageing Resistance: Excellent

Coating Compatibility: Yes (paint wetting unaffected)

Paintable: No

Fungicidal Properties: None

Shelf Life: 24 months (max. +25 °C, stored dry and shaded)

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