What Is JetLube KORR-GUARD and How Does It Differ from Standard Corrosion-Resistant Greases?

JetLube KORR-GUARD is a water-displacing storage compound engineered to solve a fundamental limitation found in most corrosion-resistant greases on the market. Conventional lithium, aluminum, and anhydrous calcium greases are typically treated with only 2–5% rust inhibitor. Because that inhibitor is oil-soluble and surface-active, it migrates toward the steel surface over time — and as the oil separates, the low additive content depletes, leaving the metal exposed.

KORR-GUARD takes a structurally different approach: the rust inhibitor is chemically complexed directly into the thickener rather than simply blended into the oil phase. This means the thickener holds the inhibitor in place, making additive depletion a far less significant factor in long-term storage protection.

The result is a grease-like coating classified as NLGI Grade 0–1, colored olive green, and suitable for both petroleum and synthetic fluid systems. It is manufactured by Whitmore Manufacturing, LLC, an ISO 9001:2015 and ISO 14001:2015 certified company under the Jet-Lube LLC brand.

Why Does KORR-GUARD’s Thickener Content Matter for Corrosion Protection?

The chemical complexing of the rust inhibitor into the thickener structure produces a significant yield reduction, driving thickener content in KORR-GUARD to a range of 19–25% — substantially higher than conventional grease formulations. This matters because in any grease system, it is the thickener (the soap matrix) that physically adheres to metal, not the oil phase.

The higher the thickener content, the longer the product physically remains on the protected surface. By embedding the rust inhibitor within this adhesive matrix rather than in the oil, KORR-GUARD maintains corrosion protection even as environmental exposure continues over extended storage periods.

The exact thickener percentage within the 19–25% range depends on intricate processing variables involved in manufacturing, according to the product data sheet.

What Are KORR-GUARD’s Key Physical and Performance Specifications?

KORR-GUARD is formulated to deliver measurable, testable performance under standardized conditions:

Dropping Point (ASTM D-2265): greater than 392°F (200°C)
Flash Point (ASTM D-92): greater than 430°F (221°C)
Penetration at 77°F (ASTM D-217): 340–375
Brookfield Viscosity (#6 spindle at 10 rpm): 42,000–75,000 centipoise (typical)
Specific Gravity: 0.94
Density: 7.85 lb/gal
Service Temperature Range: -20°F (-29°C) to 425°F (218°C)

These are average values; minor manufacturing variations that do not affect product performance are to be expected per the data sheet.

How Does KORR-GUARD Perform in Salt Fog and Spray Resistance Testing?

Salt fog resistance is the critical benchmark for any storage compound, and KORR-GUARD’s ASTM B117 results are among its most distinctive specifications:

5% NaCl solution at 100°F: greater than 2,000 hours resistance
20% NaCl solution at 100°F: greater than 750 hours resistance

These figures reflect the protection delivered by a formulation where the rust inhibitor is structurally locked into the thickener complex rather than relying on a low-percentage additive that can deplete over time. The 2,000-hour threshold at standard salt concentration is a direct indicator of long-duration storage suitability for equipment held in inventory or in transit.

What Are KORR-GUARD’s Primary Applications?

KORR-GUARD is designed as a protective grease-like coating for equipment and threaded pipe ends against rust and corrosion. A primary application is drill string connections, where it is used as a thread protector storage compound.

The data sheet specifies that when a thread protector is removed from a drill string connection coated with KORR-GUARD, less than 5% of the storage compound will remain on the connection. Good practice is to wipe off any heavy deposits before applying running compound, to avoid diluting solid contents. However, residual films do not need to be completely removed — they will not cause a base grease compatibility issue except in the case of clay-based greases, which are explicitly noted as an exception.

What Application Methods and Temperature Ranges Apply to KORR-GUARD?

KORR-GUARD supports two application techniques, each with a defined temperature window:

Brush-on application: 0°F (-18°C) to 150°F (66°C)
Spray-on application: 50°F (10°C) to 150°F (66°C)

Brush-on application has a wider low-temperature range, permitting use down to 0°F (-18°C), while spray-on is limited to a minimum of 50°F (10°C). Both methods share the same 150°F (66°C) upper application limit.

Is JetLube KORR-GUARD REACH Compliant?

Under current REACH Registration Guidelines, Jet-Lube LLC classifies KORR-GUARD as a mixture — not a substance — and therefore it does not require individual substance registration. The calcium thickeners used in manufacturing are classified as exempt under current REACH guidelines. All other materials and oils used in the product are either REACH registered or in the process of being registered by their respective manufacturers and suppliers. The product is therefore described as REACH compliant, composed of blended additives dispersed in a grease matrix of exempt calcium compounds and REACH-registered oils and additives.

Summary

JetLube KORR-GUARD complexes rust inhibitor directly into the thickener structure (19–25% thickener content), reducing additive depletion compared to standard 2–5% inhibitor greases.
Salt fog resistance exceeds 2,000 hours at 5% NaCl and 750 hours at 20% NaCl per ASTM B117 at 100°F.
Service temperature range spans -20°F (-29°C) to 425°F (218°C); dropping point exceeds 392°F (200°C) per ASTM D-2265.
Primary application is threaded pipe ends and drill string connections; not compatible as a residual film with clay-based greases.
REACH compliant as a mixture; manufactured under ISO 9001:2015 and ISO 14001:2015 certification.

Step-by-step

Remove the thread protector from the drill string connection before applying KORR-GUARD.
Wipe off any heavy deposits of residual storage compound to avoid diluting the solid contents of the running compound.
Select the appropriate application method — brush-on between 0°F and 150°F, or spray-on between 50°F and 150°F.
Apply KORR-GUARD as a uniform coating over the threaded pipe ends or equipment surfaces requiring storage protection.
Confirm no clay-based grease residue is present on the connection before leaving residual film in place.

Products discussed in this episode

Jet-Lube Korr-Guard

Browse all JetLube products on PE Energy Industrial Supply.

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Jet-Lube Korr-Guard Storage Compound: How a Complexed Rust Inhibitor Prevents Long-Term Corrosion