Would someone please explain why they are using Eze-Kote instead the standard polyurethane found at a hardware or lumber store?

From what I’ve seen Eze-Kote comes in a bottle , where a water-based polyurethane is a can.

Both are low or no odour
Both are a water clean up
Both are dry to the touch in 1/2 an hour
Both seal the wood
Both maybe used with fibreglass cloth

Eze-Coat is currently not in Canada but a similar product is available at Great Hobbies.

ALClad is in Canada