Deposits and contamination

Orange, red, brown, or yellow discoloration associated with iron-bearing material or iron corrosion products on glass.

Small droplets of molten or hot metal expelled during welding that strike and bond to, pit, or thermally damage glass.

Discoloration associated with metal or metal compounds deposited on or reacting at a glass surface.

Droplets or fragments of cement-, mortar-, grout-, stucco-, or concrete-based material deposited directly on glass.

Material released from or carried across sealants, gaskets, waterproofing products, or joint compounds and deposited on glass by water or gravity.

Airborne or settled particulate generated by cutting, grinding, drilling, demolition, masonry, drywall, concrete, or other construction activity.

Water that has contacted concrete, mortar, stucco, stone, grout, or masonry-cleaning materials before flowing onto glass.

Silicone-bearing material transferred to a glass or coating surface from sealants, lubricants, gaskets, handling, or adjacent work.

Fine droplets or particles of paint deposited unintentionally on glass during spraying or nearby coating work.

A hydrophobic residue from lubricants, skin oils, food oils, machinery, sealants, or other oily materials transferred to glass.