Tombstones and crypts

[Frightful Nights]

We are doing a couple of hundered tombstones and 5 or 6 3' x 7' ground level crypts - does anyone know a good way to seal the blue dense foam and the white beaded foam to make it tougher and weather proof

Grimm Night

[Frightful Nights]

Bump -any help ?

[scareshack]

not sure if this is like what u are speaking of, but in this article they speak of using Dry-Lok on there foam.
http://www.homehauntnews.com/june08page4.html

[Frightful Nights]

Thanks -I think that will work and it seems like it would be quicker and less expensive than foamcoat