Kluber ISOFLEX NBU 15 High-Speed Grease - Durable Protection

In this review of Kluber ISOFLEX NBU 15 the bottom line is clear: this high-speed grease is aimed at engineers and maintenance teams who need reliable, water-resistant lubrication with strong wear and corrosion protection. The reviewer found it especially useful where equipment runs at high speeds and faces moisture or medium exposure, since its blend of ester, synthetic hydrocarbon and mineral oils combined with a barium complex soap delivers consistent pressure absorption and oxidation resistance. The included 400g cartridges make it convenient for frequent service intervals and targeted relubrication.

Key Features

• High-speed formulation: Designed to perform reliably at elevated shaft and bearing speeds, reducing the risk of grease breakdown under rapid rotation.
• Blend of base oils: Combines ester oil, synthetic hydrocarbon oil and mineral oil to balance film strength, thermal stability and compatibility across a range of machines.
• Barium complex soap: Provides excellent pressure absorption capacity to protect rolling and sliding elements from contact stress.
• Water and media resistance: Resists washout and maintains lubrication where equipment is exposed to water or similar media, reducing maintenance frequency.
• Oxidation and corrosion protection: Offers good resistance to oxidation and shields metal surfaces from corrosion for longer service life.
• Convenient packaging: Supplied in 400g cartridges that simplify dispensing during routine maintenance tasks.

Who It's For

ISOFLex NBU 15 is best suited for maintenance technicians, plant engineers and service professionals responsible for bearings and high-speed rotating equipment in industrial settings. It is particularly appropriate where moisture or chemical media might challenge standard greases and where consistent pressure absorption is required.

It is less suitable for users who need specialty greases for extreme temperature extremes beyond typical industrial ranges or for those who require a lubricant specified for food-grade or medical applications, as the formulation is intended for industrial power transmission and general machinery use.

Pros & Cons

Pros

• Strong wear and corrosion protection from the combination of base oils and barium complex soap.
• Good water resistance keeps lubrication effective in damp or washdown environments.
• Pressure absorption capacity helps protect bearings under heavy or shock loads.
• Packaged in 400g cartridges for straightforward application during routine service.

Cons

• Not specified as a food-grade or extreme temperature grease, so it may not fit all niche applications.
• Package dimensions may be bulkier than some small-volume tubes for very tight storage needs.

Specifications

Product	ISOFLEX NBU 15
Included components	400g cartridges
Base oil composition	Ester oil, synthetic hydrocarbon oil, mineral oil
Thickener	Barium complex soap
Package height	23.6 centimeters
Package length	5.3 centimeters
Package width	5.3 centimeters

Our Verdict

Kluber ISOFLEX NBU 15 is a dependable high-speed grease that offers a strong balance of pressure absorption, wear and corrosion protection, and water resistance. For industrial maintenance teams seeking a robust general-purpose lubricant for bearings and rotating equipment, the included 400g cartridges and stable formulation make it good value, but those needing specialty food-grade or extreme-temperature greases should consider other products.

Frequently Asked Questions

Is ISOFLEX NBU 15 suitable for wet environments?
Yes. The grease is resistant to water and media and maintains protection in damp or washdown conditions.

What packaging is supplied with the product?
The product is supplied with 400g cartridges for convenient dispensing during maintenance.

Does this grease protect against corrosion?
Yes. The formulation offers good protection against wear and corrosion and resists oxidation over time.