Looking for MIL-PRF-16173E qualified corrosion preventive compounds for storage, shipment, or equipment preservation? Cortec® VpCI®-368M and VpCI®-369M address two distinct requirements: a firm, dry-to-touch protective film for Grade 1 applications and a soft, oily protective film for Grade 2 applications.

Cortec identifies VpCI-368M for Class I, Grade 1 and VpCI-369M for Class I, Grade 2, with both products referenced under QPL-16173 in its military applications literature.

VCI & Lubricants is an authorized Cortec distributor. Send us your specification, quantity, and delivery requirements to request pricing and availability for the appropriate M version.

Grade 1 versus Grade 2: Which protective film do you need?

MIL-PRF-16173E distinguishes corrosion preventive compounds by their film characteristics and intended applications:

• Grade 1 — Hard film: Intended for applications including extended outdoor exposure and preservation where a dry-to-touch coating is required.

• Grade 2 — Soft film: Intended for extended indoor protection and limited outdoor exposure under suitable conditions.

The specification also distinguishes Class I and Class II by VOC content. Include the required class and grade in your inquiry so the quoted material matches your purchasing requirements.

VpCI-368M: MIL-PRF-16173E Class I, Grade 1

VpCI-368M is a solvent-based temporary coating that leaves a firm, waxy, dry-to-touch protective film. It provides corrosion protection for multiple metals exposed to harsh outdoor conditions.

Cortec lists applications including:

• Flanges and pipe ends.

• Exposed machined surfaces.

• Equipment layups.

• International shipments.

• Marine environments and demanding outdoor storage.

VpCI-368M can be applied by spraying, brushing, rolling, or dipping. When the equipment is ready to return to service, the coating can be removed with suitable alkaline cleaners or solvents. Cortec lists 5-gallon pails, 55-gallon drums, totes, and bulk packaging.

VpCI-368M NSN references

National Stock Number	Unhyphenated reference
8030-00-062-6950	8030000626950
8030-00-231-2345	8030002312345
8030-00-244-1299	8030002441299
8030-00-244-1300	8030002441300

These references are drawn from Cortec’s certified-products listing and VpCI-368M product documentation.

For a purchasing requirement specifying MIL-PRF-16173E, Class I, Grade 1, request Cortec VpCI-368M by its complete product designation and include the applicable NSN.

VpCI-369M: MIL-PRF-16173E Class I, Grade 2

VpCI-369M is an oil-based temporary corrosion preventive that leaves a soft protective film and provides lubricity. Cortec describes it as suitable for protecting multiple metals in harsh, sheltered outdoor applications.

Its soft-film characteristics make it relevant when the preservation procedure calls for an oily protective layer. Cortec lists VpCI-369M as a qualified Grade 2 product, with Class I identified in its military applications literature.

VpCI-369M is available in 5-gallon pails, 55-gallon drums, totes, and bulk packaging.

VpCI-369M NSN references

National Stock Number	Unhyphenated reference
8030-00-244-1295	8030002441295
8030-00-244-1297	8030002441297
8030-00-244-1298	8030002441298
8030-01-149-1731	8030011491731

Cortec’s certified-products page lists these four NSNs for VpCI-369M under MIL-PRF-16173E Grade 2.

For a purchasing requirement specifying MIL-PRF-16173E, Class I, Grade 2, request Cortec VpCI-369M and identify the applicable NSN and any required qualification or shipment documentation.

VpCI-368M and VpCI-369M at a glance

Purchasing consideration	VpCI-368M	VpCI-369M
Specification reference	MIL-PRF-16173E, Class I, Grade 1	MIL-PRF-16173E, Class I, Grade 2
Protective film	Firm, waxy, dry to touch	Soft, oily
Product basis	Solvent-based temporary coating	Oil-based temporary coating
Selection priority	A dry-to-touch film for preservation and outdoor exposure	A soft protective film with lubricity
Manufacturer-listed packaging	5-gallon pails, 55-gallon drums, totes, bulk	5-gallon pails, 55-gallon drums, totes, bulk

Specification references and product characteristics are based on Cortec’s published technical and military product literature.

Confirm qualification and the specified revision

When purchasing a qualified corrosion preventive, match the exact product designation, specification revision, class, and grade to your order requirements.

DLA maintains qualification information in the Qualified Products Database (QPD), which replaced the paper QPL-16173 listing. Use the applicable database entry to check current qualification information during procurement.

Contact VCI & Lubricants for pricing, availability, lead time, and product documentation.