HDPE is perfect for custom vacuum clamping jigs and fixtures because it is non-porous. It holds vacuum pressure very, very well. 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.
Our pricing on HDPE is a bit expensive so check with your local plastics supplier to see if they can offer it to you for less than our website price.
Material: High-Density Polyethylene
Thickness: .75"
Color: Opaque white/natural
Finish: Smooth
Edges: Saw cut
Width and Length Tolerance: +/- .25"
Hardness: Shore D 62-69
Suitable Temperature: -40° to +149° F
Weight: 3.75 lbs per squarer foot
Tip from Joe
Don't forget to order a 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-2 or V4 vacuum press system.