Unasco Teflon Fibre Reinforced Thread Sealing Compound is a white viscous paste reinforced with teflon fibres for increased pressure resistance or for hard to seal fittings. It withstands vibration, thermal changes and high pressures and is suitable for a broad range of applications including fuels, gases and water. Pressure tested by CSIRO to 850kPa on air, 4000kPa on water and 5500kPa on oil. Click here for Material Safety Data Sheet (MSDS).