Materials
NR Natural Rubber
IR Synthetic Polyisoprene
SBR Styrene Butadiene
IIR Butyl
BR Polybutadiene
EPDM Ethylene Propylene
CR Chloroprene/Neoprene
NBR Nitrile
PU Urethane
SI Silicone
CSM Hypalon
AC Acrylic
FL Fluoroelastomers (Viton™)
   
Ratings:
VP Very Poor
P Poor
F Fair
G Good
VG Very Good
E Excellent
O Outstanding
   

Material Selection

The chart below lists commonly used elastomers, indicating their relative physical properties and resistance to environmental factors. It can be used as a general guide to help you decide which type of rubber may be best suited for your application. The experts at Poly Seal Industries can help you determine what material is exactly right for your product.

 

Base elastomer NR IR SBR IIR BR EPDM CR NBR PU SI CSM AC FL
Max temperature 212 212 225 250 212 300 250 250 250 550 250 350 350
Min temperature -60 -60 -60 -50 -80 -60 -40 -60 -65 -160 -40 -20 -20
Max tensile (psi) 4000 4000 3500 3000 3000 3000 4000 4000 8000 1500 2800 2200 2400
Max elongation % 700 750 700 700 700 300 600 600 700 800 500 400 350
Compression set G F G F F F G G E VG G G VG
Resilience O O G F O G E G VG G G G F
Abrasion resist E E E VG E VG E E O P E G G
Flame resist VP VP VP VP VP VP G P P G G P E
Weather resist F F F VG F E VG F E E E VG E
Ozone resist VP VP VP E VP O E VP E E O E O
Water swell G E E E E E G E F VG 3 F 4
Acid resist G G G E G VG G G P F E F VG
Gasoline resist VP VP VP VP VP VP G E E P F E E
Oil resist VP VP VP VP VP VP G VG VG P-VG G E O
Synthetic lubricant (Diesters) P P VP F P P VP G VP P VP G G
Hydraulic Fld. (silicate) VP VP P F VP G G F NK VP G G G
Hydraulic Fld. (phosphate) P P VP G P VG VP VP VP G P VP VP
Bond rating E E E VG E VP-G VG VG G VG G G F
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