Loren,
You might consider trying a low melting temperature bismuth alloy.
Melts with 158=B0 F hot water. Have to be careful about the fact that
it is a lead alloy, Its slight expansion upon solidification make it
very usefull stuff for holding fixtures and tube bending. One source
is
http://www.engineeringfindings.com/cat22/cat22pg33.pdf
Jeff
Jeff Demand
http://www.aztec-net.com/~jdemand