Full definition
Sheet produced from acrylonitrile-butadiene rubber (NBR) providing 3-5x greater resistance to mineral oils, fuels, greases, and hydraulic fluids compared to standard SBR sheet, making it the standard material for gaskets and seals in oil-exposed environments. ACN content: typically 30-38% for sheet products (medium-high oil resistance with adequate flexibility). Thicknesses: 1.5-12 mm standard. Widths: 1,000-1,500 mm in rolls, typically 5-10 m long. Hardness: 50-80 Shore A. Temperature range: -30 to +100°C. Per ASTM D2000 classification BG (medium ACN) to BK (high ACN). Applications: oil seals for rotating equipment, refinery flange gaskets, fuel system gaskets, hydraulic press seals, metalworking machine guards and covers, and workshop bench tops (oil-resistant surface). Also available with 1-2 ply fabric reinforcement for higher tensile strength and dimensional stability. Limitations: poor ozone and UV resistance — not for outdoor use without protection; attacked by ketones, esters, and chlorinated solvents. NBR sheet commands a 50-100% price premium over SBR sheet but provides far superior service life in oily environments. Colors: black standard, blue (utility identification).