Special Packing:
Since aluminum profiles generally do not tend to rust, there’s no reason as to why they shouldn’t be used as window frames. Windows are always exposed to environmental factors such as heavy rain, or high-temperature conditions. Aluminum window profiles won’t easily melt or even rust, thereby allowing window openings to be adjusted as freely as possible, even for long periods.
What are the disadvantages of aluminium windows?

If properly sealed, chromic acid anodize affords the aluminum equivalent to corrosion protection to the relatively thick sulfuric and Hardcoat type anodize.