I don't think you will get very long results with that fix.
Take it apart and do it again.
If you don't have time to do it right ....when will you have time to fix it?
Answer is... a "soon" as it leaks.
Seen way to many shower pans that leak because they were never installed correctly.Ceilings below and floors adjacent to the problem always creap in to the scenario.
Glad to be back to help out.