Fire-prevention glass Pyrobel 21

Fire-prevention glass Pyrobel 21 - laminated glass with a few colorless intumescent layers. In case of fire, these layers change their physical characteristics and the glass turns into a rigid and opaque protective structure that allows to maintain the integrity of the glazing and insulation. Fire-prevention glass Pirobel 21/21 EG provides two-way protection.

Technical characteristics of the PIROBEL 21 fire-prevention glass:

  • According to GOST 53308-2009
  • Fire-resistant glazing of EIW60

* (E) integrity. guarantees lack of through cracks or openings through which the flame and products of burning can penetrate;
    (I) the heat-insulating ability, prevents the transfer of heat to the protected space by the radiation
   (W) limiting the density of heat flow

Fire resistance limit:

  • Integrity — 60 minutes
  • Heat insulation — 60 minutes
Specifications EI45/ EW60  

Type of glazing


Use of


Thickness 21,6 mm
Thickness tolerance ± 1 mm
Weight  47 kg/m2
Tolerance for overall dimensions  ±2 mm
Light transmission (EN 410) xu / pv  83
The heat transfer coefficient (EN 673)  5,3 Вт/m2.K
Safety class (EN 12600) 

Class B

The sound reduction index (EN 12758) Rw (C; Ctt)  38 (-1; -3) dB