I'd be a bit worried it doesn't mention anything about being suitable for glass cleaning.
The guy in the shop says same rules apply as using virosol, don't let it dry on the glass.
There has been days this week and last that we have had to stop start due to wind, chemical is applied in sections upto 20 windows along 6 down so a biggish area, the chemical had dried in completely needing to be reapplied, when cleaned off it's not left any staining, as were the sections that we used virosol on did leave some small stains behind after it had been allowed to dry .......
Dilution rate for virosol say 1/250
Dilution rate for this hd degreaser 1/1200
If you go on the general cleaning ( jet washing ) Chris Scott did a job were he removed all lead staining and lime scale off glass conservatory/ building of some type, there's a pic somewhere in the archives. It maybe worth asking him what he used.
U may have to apply it by hand to get best results