Foam Type

[cnc_fabricator11]

Morning,


I'm in the midst of creating a topo model and I read somewhere that 8 lb/cf polyurethane
foam is the way to go. Would anyone happen to know more about this material and where to get it?



Thanks,


-P

[dakers]

http://www.aircraftspruce.com/catalog/cmpages/lastafoam.php

you can use last-a-foam available at link but some topographical makers use up to 18 lb foam so you can use the precision board which you can get in densities of 4 to 15 lb if in stock at harbor sales.
http://www.harborsales.net/tabid/130/Default.aspx?ProductTypeId=168&ProductFilter4=Precision+Board