Originally Posted By: dakkon
put a bit of expanding sprayfoam in the bottom to seal the posts, then fill them with play sand?


Thanks for the suggestion. Expanding sprayfoam seems like it would be perfect for sealing the bottoms. Exactly what I was looking for. I'll probably use sand, but put it in plastic bags to avoid the mess.

Last edited by bern43; 10/01/13 02:52 AM.