Bigtuna19 said:
Will steel flex plug small cracks and seal small weeping rivets ?? And is just one coat enough protection I'm curious ?? I use the boat in the salt water mainly bays and coves
I'd use the G-Flex 650, only $20 for a 2-part 4-ounce (each bottle) kit around here (Nor'East US). You will only be mixing a capfull of each to do a ton of rivets. Use a little heat, as shown in link below, to allow it to weep in.
Not only is this a more co$t effective way to do what YOU need, you can get it locally and it stays adhered even when flexed.
See: https://www.forum.tinboats.net/viewtopic.php?f=3&t=40954
I have a few embedded links in there, so look at all of them, as one specifically addresses patching holes.
Be aware all epoxies (less special mixes) are prone to degradation to UV exposure, so topcoat it if you can. On the bottom, I just clean off the anti-fouling paint well (if used) make the seal and top-coat with new paint. But I moor my boats 24/7, so they need the AF paint.