cowl leak

[bucannon]

okay so on my truck i pulled out the floor mat and found alot of rust.after sanding and priming the floor itook off the cowl and found rust holes under a pile of leaves. after cleaning it out and putting phosphorus on it, i started to layer on some black silicone.

my question is will this work and is there anything else i can do to enshure no more water leaks in because im getting ready to put in my new insulation and floor mat.

thanks yall!