Semco Dur is the single-glazing tempered glass made by Semco. It is a thermally tempered glass where the pretension is achieved through heat treatment of the glass. The rapid and even heating of the glass pane, combined with subsequent rapid cooling, strengthens the outer zone of the pane. The glass evidences increased impact and flexural strength, ball-impact resistance and improved temperature fluctuation resistance following this treatment.
If the glass is broken, the tempered glass does not shatter like normal glass but breaks down into a fine "spider web" network of blunt, small pieces of glass. This property increases safety.