Not rigid enough for spanning the top or supporting itself but can be wrapped around another rigid material such as a plastic bucket. Nasty stuff to carry around in the car for awhile. Gooey foam to fill cracks, holes, pipes. This is like foam glue, it dries to a rigid foam. Seals against water and insects.
Mice chew through it if pressed.
Excellent for sticking the cable to concrete or holding a plastic bucket down. Best if the entire can is used at once because it will glue the can closed if not halted properly. It is fairly expensive however. This sheds water and prevents the lid from sliding sideways to uncover a portion of the vault. Again, there should be a way to lock the lid in place.