Key:

Sizes Temp (F) Hardness Application Guide Grades
Standard Metric Low High Soft Standard Hard Oil Chemicals Water Steam Food 3A Certified NSF Certified Metal Detectable Clean Room Medical Grade
Buna-N Strong and durable with good resistance to oil, water, and mild chemicals
Yes Yes -40 250 50A 70A 90A Excellent Good Good Yes Yes Yes Yes
Viton Excellent resistance to heat, oil, and chemicals
Yes Yes -10 400 60A 75A 90A Excellent Excellent Good Yes Yes Yes Yes Yes
Silicone Excellent resistance to wide temperatures, long lasting
Yes Yes -85 450 50A 70A Good Good Good Yes Yes Yes Yes Yes
EPDM Excellent resistance to water, steam and chemicals
Yes Yes -70 300 50A 70A 80A Good Excellent Good Yes Yes Yes Yes Yes
Kalrez For ultra-high temperatures and aggressive chemicals
Yes Yes 32 600 70A 90A Excellent Excellent Excellent Good Yes Yes Yes Yes
Aflas For chemicals, oils, heat, and steam
Yes No 25 450 80A Excellent Excellent Good Good Yes
Fluorosilicone Excellent oil, chemical and temperature resistance
Yes No -80 350 70A Excellent Excellent Good Yes
Neoprene Excellent for refrigerants
Yes Yes -35 250 70A Good Good Good Yes
Polyurethane Strongest material, good for high pressures
Yes No -20 180 70A 90A Good Yes
PTFE Chemically inert, excellent temperature range
Yes Yes -100 500 55D Excellent Excellent Excellent Excellent Yes Yes