Tylok Tyspy is a leak detector for use in all sealing applications. This leak detector is capable of detecting fine leaks on gaseous system components with ease. Formulated to be non-toxic, non-corrosive, non-staining and non-flammable, making it suitable for use in a wide array of applications. Tyspy meets the performance requirements of MIL PRF 25567 Leak Detection Compound, Oxygen Systems Type I. Comes in 8 ounce squeeze bottle with applicator tube. Also available in gallon jugs and in a low temperature version.