Silicone Q, Si Polysiloxane -80 F / Excellent Moderate Many 420 F high and or solvents, low oxidizing oils, chemicals, ozone, acids, properties. dilute Fair sodium sodium physical hydroxide. hydroxide. properties. SBR SBR -20 F / Good Most Ozone, 212F physical moderate strong properties chemicals, acids, fats, and wet or dry, oils, abrasion organic greases, resistance. acids, most Poor alcohols, resistance ketones, to fluids. Butyl IIR -60 F / Very good Animal 250 F weathering and solvents, resistance. vegetable coal tar Excellent fats, oils, solvents, dielectric greases, aromatic properties. ozone, Low strong and oxidizing to air. chemicals. Good physical properties. Poor resistance to fluids. Natural, NR Isoprene, -60 F / Excellent Most Ozone, Gum natural 220 F physical moderate strong Rubber properties chemicals, acids, fats, including wet or dry, oils,
Silicone Q, Si Polysiloxane -80 F / 420 F Excellent high and low properties. Fair physical properties. Moderate or oxidizing chemicals, ozone, sodium hydroxide. Many solvents, oils, acids, dilute sodium hydroxide. SBR SBR -20 F / 212F Good physical properties and abrasion resistance. Poor resistance to fluids. Most moderate chemicals, wet or dry, organic acids, alcohols, ketones, Ozone, strong acids, fats, oils, greases, most Butyl IIR -60 F / 250 F Very good weathering resistance. Excellent dielectric properties. Low to air. Good physical properties. Poor resistance to fluids. Animal and vegetable fats, oils, greases, ozone, strong and oxidizing chemicals. solvents, coal tar solvents, aromatic Natural, Gum Rubber NR Isoprene, natural -60 F / 220 F Excellent physical properties including Most moderate chemicals, wet or dry, Ozone, strong acids, fats, oils,