Fire protection ROBAX – fireplace glass Robax fireplace glass is a special glass resistant to high temperatures. It is characterized by a low thermal expansion coefficient, which makes it highly resistant to large temperature differences on both sides of the glass.We offer two types of Robax glass. Please use the link below for more information. ROBAX Foto. Schott Foto. Schott Foto. AGC Wired glass – polished We offer polished wired glass produced by AGC. This type of glass has the lowest fire resistance class – E-30. Wired glass - polished E-30 Foto. AGC