I built a Minion mailbox for my daughter. In order to get it up to regulation height and make it stable without being fixed in place, we plan to set it in a wash tub full of concrete.

She wants to put a rubber-duckie style float around his waist as a gag. Sorta like this:



Just inflating it would be problematic as it will get punctured sooner than later.

If I could figure out how, I'd fill it with minimally expanding spray foam, but wonder if Slime/Fix-a-Flat would work? Not sure they'd fill it out, and I'd be concerned about over-pressuring it and bursting it.

Opinions/Ideas?

Doesn’t fix a flat remain liquid?

quote:

Originally posted by a1abdj:
Doesn’t fix a flat remain liquid?

Yeah, I think you're right about that. I do know they have a foam for filling tires in places where thorns are an issue. I'll have to look into that.