- Working temperature: from -200 ° C to +700 ° C
- Flammability class - NF (non-flammable)
- No asbestos
- Chemically inert
- Not toxic, don't secrete harmful substances
- Low resistance to abrasion
Composition:- SiO2—not less than 94%
- Al2O3— 2..7-3.6%
- Na2O - no more than 0,8%
- Fe2O3 - no more than 0,15%