How to Set Up Your Fence | Kraken Fence Post Fix Application

How to Set Up Your Fence | Kraken Fence Post Fix Application
Quickly Sets and Fast to Apply
Sets in 3-5 minutes. Cures in 3 to 5 Minutes
Fast, Easy and Strong application.
You don’t need cement, water and any concrate mixing materials.
Waterproof; helps protecting the post against rotting,
High strength against impacts and shocks
🛒 Product 👉 krakenbond.net...

[@johnarmenta2199]

"20 square feet at 1 inch thick" - I calculate that to be 1.667 (1-2/3) cu. ft. per 2-bottle kit. Calculating a 6" diameter hole, 3 feet deep, I get about 0.6 cu ft. If I insert a 2" x 2" steel tube as a fence post, the volume is reduced to 0.5 cu ft. (Obviously the video shows a much larger post and hole size.) That means I can use a single 2-bottle kit to set three posts.
Q1: Does the scenario I just provide sound right?
Q1: Can I use this foam on steel posts? How about painted steel posts?
Q2: Once the foam is set, can I pour MORE foam on it. For instance, let's say I pour the liquid, but it doesn't foam up high enough. Can I add more liquid on top of the set foam so that it DOES foam up high enough? (This would be called a "cold pour" in concrete terms, which is NOT a good construction practice.)
Any help you can offer would be greatly appreciated.
Thanks!

[@nicksampson7269]

how many do i need?

[@krakenbond]

Each can cover 20 square feet at 1 inch thick of spray foam with an R-value of 5.66.