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| | Material | Temperature range | Max. size | Max. resistance density* | Comments | |
| | Polyimide/WA | -200 to 150°C -328 to 302°F | 560 mm x 1825 mm 22" x 72" | 230 fi/crrf 1500 fi/in2 | Similar to Polyimide/FEP except lower cost, higher resistance densities, and lower temperature range. WA is preferred over FEP for most custom designs under 150°C. | |
| | Polyimide/ULA Polyimide film with UL recognized thermosetting acrylic adhesive | -200 to 150°C -328 to 302°F | 560 mm x 1825 mm 22" x 72" | 230 fi/cnf 1500 fi/in2 | Similar to Polyimide/WA except UL recognized (UL94V-0). | |
| | AN-Polyimide (AP) Polyimide film with polyimide adhesive | -200 to 260°C -328 to 500°F | 560 mm x 1145 mm 22" x 45" | 230 Q/cnf 1500 fi/in2 | Higher temperatures and watt densities than industry standard flexible Polyimide construction. | |
| | PTFE | -200 to 150°C -328 to 302°F | 254 mm x 1016 mm 10" x 40" | 70 fi/crrf 450 fi/in2 | Fully sealed construction suitable for immersion in acids, bases, and other corrosive chemicals. | |
| | Polyester (with thermosetting adhesive) | -40 to 105°C -40 to 221°F | 560 mm x 1825 mm 22" x 72" | 217 fi/crrf 1400 fi/in2 | Low cost material for economic fabrication of large heaters. | |
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