tag:blogger.com,1999:blog-12223283.post-74750356618166303082007-09-10T10:33:00.000+01:002007-09-10T10:33:00.000+01:002007-09-10T10:33:00.000+01:00Obviously you can just slap a slab of something insulating on top of the JB weld but best results would probably come from force cooling said slab. At the cost of a more complex set of side walls for the mould you should be able to include a few (2-5)small metal tubes (of the sort used in model airplane construction and so forth (talk to the guy at your local hobby shop)) running horizontally through the slab at little or no strength cost. Air can be forced through or allowed to convect.briandhttp://www.blogger.com/profile/14122231134789709439noreply@blogger.com