E-glass is the high-quality production basis for the Thermo-E-glass products of Calvo Sealing. E-glass has a high thermal resistance and excellent electric insulating properties.

Thermo-E-glass needle mats are needled mechanically by means of a modern production method without addition of binders; basic material for these needle mats are high-quality Eglass fibres.
Thermo-E-glass needle mats are incombustible, are-sistant up to approx. 550°C/1022°F and have excellent insulating properties and good vibration stability.