It often happens during locksmith work or the installation of railings: a worker uses an angle grinder or welds a seam while the adjacent glass facades are inadequately protected. The glowing metal particles, reaching up to 1,200 °C, strike the cool glass surface at high speed. What initially looks like tiny black dust is, in fact, a catastrophe for the glass: the particles burn deep into the surface and fuse with the material.
This so-called “pitting” can no longer be wiped away. Anyone attempting to clean it risks deep scratches from the sharp metal inclusions. For construction managers and architects in Switzerland, this used to mean a total loss of the pane. But at Polygon Smart Repair, we have developed a way with GLASSRESQ to solve this problem without the costly replacement.
Why Replacement Is Often the Worst Solution
Especially for large storefront windows or façade elements in cities like Zurich or Geneva, a replacement can be a nightmare: street closures, crane rentals, long lead times for specialty glass, and the risk of damaging surrounding insulation.
Our experts, on the other hand, arrive with mobile equipment. Whether at our headquarters in Wädenswil or on a construction site in Ticino, we perform the restoration directly on-site.
The GLASSRESQ Process: Millimeter-Precision on Glass
Our technicians mechanically remove every single metal particle. The top layer of the glass is precisely abraded and then polished in multiple stages so that no optical distortions (lensing) occur.
-
-
Safety: The structural properties of the glass remain intact.
-
Appearance: The pane regains its original transparency and brilliance.
-
Efficiency: We often work alongside ongoing construction activities without disrupting other trades.
-
A Clear Advantage for the Construction Budget
A restoration by our specialists usually costs only a fraction of a glass replacement. In addition, the ecological footprint of producing new glass is avoided. Across Switzerland, insurers and general contractors appreciate this resource-saving and fast intervention option.
Metal Impacts Are Not a Total Loss
Before signing a contract for new glazing, let us assess the damage. We restore glass surfaces that others have already given up on.
Have you noticed “burned-in” sparks on your panes? Call us. We conduct a technical evaluation and show you how we can return your façade to its original condition without a major construction project.

