MaterialGradeDeflection
force, psi
Compression
set (73°F)
Compression
set (158°F)
Suggested
temperature (°F)
Relative load
retention
CommentsCELLULAR URETHANES4701-30-20125-04Very soft3 to 8<2<100 to 194ExcellentMicrocellular, low outgassing4701-40-20125-04Soft/medium7 to 13<2<100 to 194ExcellentMicrocellular, low outgassing4701-50-20125-04Firm13 to 23<2<100 to 194ExcellentMicrocellular, low outgassingCLOSED-CELL SPONGER411-N neopreneSoft2 to 5<25N/A-40 to 200FairCuring agents may outgasR431-N neopreneMedium9 to 13<25N/A-40 to 200FairCuring agents may outgasR495-T EPDMSoft2 to 5<25N/A-40 to 200FairCuring agents may outgasV-740 VinylSoft2 to 5<10N/A-15 to 160PoorPlasticizer migrationCELLULAR SILICONESHT870Soft2 to 7<5<5-67 to 392GoodOpen cell, UL94VO flame ratingHT800Medium6 to 14<5<5-67 to 392ExcellentClosed cell, UL94VO flame ratingR10470-MMedium6 to 14<5<10-100 to 500GoodClosed cell, mechanically durableDeflection force test per ASTM D1056, 73°F
Compression set test per ASTM D1056, 50% for 22 hr



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