WEICON HT 300 adhesive and sealant is red, high-temperature resistant (+300°C/+572°F), free of solvents, strong, and has acetatecross-linking properties. It is resistant to weathering, ageing and chemicals and is extremely elastic (breaking elongation of approx. 500%).

HT 300 is particularly suitable for heat-exposed bonds and seals and adheres very well to steel, aluminium, glass, ceramics and many additional materials.

HT 300 can be used in industrial furnaces, flue gas systems, heating installations, exhaust gas routing, heating cabinets and in many additional areas.

ISSA: 75.634.20/21

IMPA: 81 52 82/83


Technical Data
Basis 1-K. Polysiloxan (Acetat)
Density 1,28 g/cm³
Viscosity pasty
Stability/Run-off (ASTM D 2202) 1 mm
Processing temperature +5 bis +35 °C
Cure type by humidity
Curing condition from +5°C to +40°C and 30% to 95% relative humidity
Skin-over time 12 min.
Cure speed (first 24 h) 2-3 mm
Volume change (DIN 52451) -1 %
Gap filling up to max. 5 mm
Shelf life (+5°C to +25°C) 12 months
Shore Hardness A (DIN 53505 / ASTM D 2240) ± 5 35
Elongation at break (DIN 53504 / ASTM D 412) ca. 500 %
Tensile strength of the pure adhesive/sealant 2,0 N/mm²
Average tensile shear strength (DIN 53283/ASTM D 1002) 1,3 N/mm²
Tear strength (DIN 53515 / ASTM D 624) 6,0 N/mm²
Movement capacity max. 15 %
Temperature resistance -60 to +280 briefly (approx. 2 hrs.) +300 °C
Solid content 100 %
Specific forward resistance 2,5 x 10^15 Ohm/cm
Dielectric strength 21 kV/mm
Thermal conductivity 0,3 W/m·K
Overpaintable (liquid paint) No
Building material category (DIN 4102) B2




Additional information

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