Chemical | Concentration % | Hours | Effect Hydraulic Fluid (Skydrol) | 100 | 1,500 | None Jet Fuel (JP-4) | 100 | 1,500 | None Brake Fluid | 100 | 1,500 | None Water & Gas at 250°F at 2,000 psi | 79% CH 4, 6% CO 2, 15% H 2 S | 24 | None Other fluid resistances for Xylan 1000 and 1400 series.