On Wed, 11 Jan 2006 16:41:16 -0000, "Henry"
Henryaintgonnatell.sunnysideup.com wrote:

Bet getting the exact volume required is tricky :-)

It splurges out the sides a bit - you trim afterwards

PU squirty foam doesn't have anything like the expansive power of the
two-part mix PUs foams used to make buoyancy blocks on boats. If you
constrain the squirty stuff it just seems to end up denser.