Yes it would definitely harden. Although lumps in the bottom don't look so good. we are going to do an update on the new ekopel coating shortly the new hardner is the change but very similar. Keeping in mind it is a resin not a paint, so it will harden even 2 inches deep and even under water as we discovered when too much product goes down the drain and fills the s bend. but for a durable finish 5mm is the thickest you want to fill.

@@thebathman5574 Thank you .. product and workmanship looks great

and if there are drops at the end is there a way to fix it?