HDPE is perfect for custom vacuum clamping jigs and fixtures because it is non-porous. It holds vacuum pressure perfectly! It's also very strong and yet machinable with almost any woodworking tool. I've sawn, routed, turned, planed, and tapped HDPE with no problem.
This HDPE is sold without any ports or holes drilled in it so that you can make a vacuum clamping jig in any size we stock.
Material: High-Density Polyethylene
Thickness: .75"
Color: Opaque white/natural
Finish: Smooth
Edges: Saw cut
Size Tolerance: +/- .025"
Hardness: Shore D 62-69
Suitable Temperature: -40° to +149° F
Weight: 3.75 lbs/sqr ft
Tip from Joe
Don't forget to order an 1/8" NPT pipe tap, brass fitting, and vacuum gasket tape to complete you vacuum jig. You might also need the vacuum clamping add-on if you have a Project: EVS or V2 vacuum press system.