Soft floor discussion (pics and steps to fix included)

That's a cute little tool.
FWIW, they do make foam adhesive (maybe it's PL that has one). The strength of these composite floors is all about the bond of the three layers that make the sandwich. Lose one of those surface bonds and the composite is really weakened. IMO, they shouldn't use this design for a trailer floor. I had one area in my floor that was damaged from a leaking water heater. The rest was in great shape and the floor is 44 years old. It is 5/8" plywood over 2"x2" joists.