any hardware store. Sold under the name "Great Stuff". Look in the insulation/weatherstripping section. About $5 a can. Also, this stuff cannot be cleaned up easily - it loves to stick to your hands for weeks at a time. Very waterproof.
P4 firstname.lastname@example.org dual R134A phase change chillers with 600watt thermoelectric array. Capable of -70F
Nixie tube numeric display control panel and pneumatic motherboard tray.