ZP-9F is a non-aqueous developer made of organic particles, used often in aerosol cans. It produces a fast-drying, opaque white coating and contrasting background for fluorescent and visible penetrant inspections.

It is typically used for a wide variety of testing materials such as welds, castings, forgings, leak testing, pressure vessels, aircraft, marine, construction, maintenance, petroleum pipelines, power plant components, and general metalwork in automotive, off-highway equipment and farm equipment.

ZP-9F is listed on the QPL SAE AMS 2644 Qualified Product List.