TYSPY Liquid Leak Detector is safe for oxygen systems and detects gas leaks in hard-to-reach areas. It works in temperatures from -65°F to 200°F (-54°C to 93°C), and meets MIL-PF25567, NFPA 52, and EPA Method 21 standards. The formula is nontoxic, noncorrosive, and nonflammable. It creates sustainable bubbles, even on small leaks and vertical surfaces. The flexible tube extends to reach difficult spots, and the formula dries clean without staining. Ideal for leak testing compressed natural gas systems.