Sherlock TI-G - MIL-PRF-25567E Leak Detector 1 Gallon

The Sherlock TI-G is a 1-gallon jug of Winton Products' Type I oxygen-compatible leak detection fluid, the go-to volume format for line maintenance stations, MRO shops, and FBOs that perform regular aircraft pneumatic and oxygen system inspections. Qualified to MIL-PRF-25567E — the active DoD performance specification for leak detection compounds used in oxygen systems — this is the same trusted Sherlock formula relied on by A&P mechanics and aviation maintenance technicians worldwide, sized for the shop bench rather than the tool bag.

Why Type I and Why a Gallon?

Sherlock Type I is formulated for use in ambient and warm-weather maintenance environments, rated from +35°F to +160°F. It is the correct specification for indoor hangar work and temperate ramp operations — the condition under which the vast majority of aircraft oxygen system checks, pneumatic line inspections, and post-maintenance leak verification tasks are performed. The 1-gallon container is the smart choice for any shop that performs these checks regularly: it eliminates the per-ounce premium of smaller bottles, supports multiple technicians working simultaneously, and allows easy refill of squeeze bottles or dauber applicators at the workstation without repeatedly breaking out new stock.

Key Features

• Qualified to MIL-PRF-25567E / MIL-L-25567 Type I — accepted by commercial AMMs and military technical orders for oxygen system leak checks
• Oxygen-safe formulation — contains no oil, grease, fat, ammonia, or materials that could form a flammable or explosive mixture with concentrated oxygen
• Neutral solution — safe on metals, elastomers, and coatings typical of aircraft pneumatic, hydraulic, and oxygen system components
• Fast visual response — small leaks produce a distinctive white foam that builds over 5 to 10 minutes; large leaks produce immediate large bubble clusters
• Residue-free — dries clean without greasy or staining residue, requiring no post-inspection cleaning of the work area
• Non-flammable and non-hazardous — classified non-hazardous under OSHA HCS (HAZCOM 2012) and WHMIS 2015
• Ready to use — no mixing or dilution required; apply directly from the container
• 24-month shelf life — stock with confidence for scheduled and unscheduled maintenance demand

Applications

• Aircraft oxygen system leak checks — high-pressure and low-pressure circuits, required per most commercial AMMs and military TOs
• Pneumatic system lines, fittings, valves, and manifold connections
• Hydraulic and pressurized fuel system verification
• Nitrogen purge line and servicing port checks
• Tire and strut inflation valve inspection
• Any pressurized gas or air system that can be safely leak-checked with a liquid compound

How to Use

Pressurize the system to the appropriate test pressure per the applicable maintenance manual. Apply Sherlock TI-G to the joint, fitting, or suspected leak area using a brush, dauber, squeeze bottle, or trigger sprayer — the gallon jug allows convenient decanting into whatever applicator your procedure requires. Watch the treated area: fine leaks will produce a dense white foam that accumulates over 5 to 10 minutes, making pinhole leaks visible that would be impossible to detect by feel or sound alone. Large leaks produce an immediate cluster of bubbles. After inspection, the area dries clean with no residue requiring removal before return to service.