NO!
Do not do that.
Why not let the cat out to chase it off?
We had a similar problem a few years ago. A cat was showing up at night, and our male indoor cat would go crazy. The straw for me was our cat’s marking the basement window where he was seeing the other cat.
I thought I had cleaned all of the “marker” urine and treated it with enzyme formula, but apparently I did not get all of it. Next thing was that our kitty, who apparently could smell that urine in the basement, elected to urinate into the heating duct in the living room that was above the previously violated window.
I kept smelling it and then going back to the basement to clean some more. It took about 2 weeks before I realized what had happened. The smell was sometimes stronger and sometimes weaker, so he must have been using the heating vent multiple times.
So it took me a long time, but I cleaned and treated the dang vent. Well, the next time that cat showed up, we let our cat out to chase him off. Worked like a charm.