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WEICON Silicon HT-300 FB 280 ml, red high-temperature acetoxy silicone sealant for ovens, exhausts and heating systems

silikon-ht-300-czerwony-280ml-uszczelniacz-wysokotemperaturowy
Availability: Available 11-20 pcs
Delivery: The price does not include any possible payment costs check the delivery methods
Price: €10.75 10.75
Net price: €8.74
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Vendor: Weicon
Product code: 10104250

Description

WEICON Silicon HT-300 FB 280 ml is a high-temperature, acetoxy-curing silicone adhesive/sealant in red. It remains elastic and weather-resistant and withstands up to +280 °C (short-term +300 °C), making it ideal for ovens, exhaust systems and heating installations.

Benefits and key features

  • Temperature resistance −40…+280 °C, short-term to +300 °C
  • Skin formation ~8 min; cure rate 2–3 mm / 24 h
  • High elasticity – elongation ~300%, hardness ~30 ShA
  • Strong adhesion to steel, aluminium, glass and ceramics
  • Solvent-free; acetoxy cure

Properties and applications

  • High-temp sealing: industrial ovens, boilers, heat exchangers and chambers.
  • Automotive / MRO: exhaust systems, heat shields, flue connections.
  • HVAC: duct penetrations, flanges, heater housings.
  • Bonding: metal and glass parts exposed to vibration and temperature cycles.
  • Note: HT-300 is not paintable; clean and degrease substrates before use.

Technical parameters

Parameter Value
Colour red
Net volume 280 ml (FB cartridge)
State / appearance paste, 1-component polysiloxane (acetoxy)
Density (20 °C) ~1.18 g/cm³
Curing type moisture-curing (acetoxy)
Skin formation ~8 min
Cure rate (first 24 h) ~2–3 mm
Hardness ~30 Shore A
Elongation at break ~300%
Max. permissible movement ~15%
Service temperature −40…+280 °C, short-term +300 °C
Paintability no – not paintable
Building material class B2 (DIN 4102)
Odour characteristic (acetoxy)
Flash point (closed cup) > 93.3 °C
CLP classification mixture not classified as hazardous
Transport not regulated by ADR/IMDG/IATA

Storage recommendations

Store upright in the original sealed cartridge, in a dry, cool place away from sunlight and heat sources. Recommended shelf life: up to 12 months at approx. +5…+25 °C. Clean and degrease substrate before application.

FAQ

1) Is HT-300 paintable?
No, select the correct colour before application.

2) Temperature resistance?
Service up to +280 °C, short-term up to +300 °C.

3) How fast does it cure?
Skin ~8 min; ~2–3 mm/24 h at 23 °C / 50% RH.

4) Substrates it bonds to?
Steel, aluminium, glass, ceramics and many mineral substrates.

5) Surface preparation?
Remove dust, oils and grease; use cleaner/primer if needed.

Safety

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