Nickel Sulphide Inclusions* are a naturally occurring phenomenon in glass where impurities can be contained in the glass pane after its manufacture and toughening processes. Small particles of nickel sulphide to be present in the glass and no glazing manufacturers are able to provide a warranty against breakages from this phenomenon.

Visually, you will not able to see these tiny particles of metal but they can still be present in the glass, lying dormant until aggravated, the inclusion can cause a breakage or shattering of glass.

Flexi25 Glass Anchoring System can significantly reduce the damaging consequences of Nickel Sulphide Inclusions by keeping the shattered glass within the window frame. Protecting visitors, staff and the general public within the vicinity.

*Nickel Sulphide Inclusions have two main states, stable at high temperatures and stable at lower temperatures. When glass is heat soaked, the heat converts the Nickel Sulphide Inclusion to the high temperature state, when the glass is cooled rapidly it doesn’t allow the Nickel Sulphide Inclusion the opportunity to change to the lower temperature state. The transformation can occur over time – a glass breakage caused by nickel sulphide inclusion can happen if the inclusion is large enough and if it is located within the central portion of the glass.