Kluber Lubrication UNISILKON-L641 (500-Gram-Tin)

Additional Product Information

Overview

UNISILKON L 641 is a high-performance silicone-based lubricating grease with PTFE, designed for valves and components in the drinking water, beverage, and heating industries. Trusted in MRO and industrial applications, it ensures smooth operation, consistent actuating forces, and reliable sealing even in demanding environments. Teams rely on it for its stability, food-safe certification, and resistance to water, steam, and common cleaning agents.

Key Technical Specs for UNISILKON L 641

• Type: Silicone oil-based grease with PTFE
• Size/Volume: Can 500 g, Bucket 30 kg
• Color: White
• Viscosity/Consistency: Worked penetration 300 320 x 0.1 mm at 25? C; shear viscosity 135,000 205,000 mPas at 25? C
• Cure/Working Time: Not applicable (ready-to-use grease)
• Tensile/Peel Strength: Not specified
• Shore Hardness: Not applicable
• Service Temperature: -40? C to 160? C (-40? F to 320? F)
• Typical Uses: Lubrication and sealing of valves, mixer taps, thermostatic valves, radial shaft seals, and assembly of seals in food and water applications
• Shelf Life: Approx. 36 months in a dry, frost-free place in unopened container

Approvals & Specifications

• NSF H1 registered (FDA 21 CFR 178.3570 compliant)
• Tested per German Environmental Agency (UBA), WRAS, ACS, NSF Standard 61
• Food and beverage safe for incidental contact

Typical Aircraft MRO / AOG Applications

• Lubrication of small valves and seals in water systems on aircraft
• Sealing and assembly of components exposed to potable water
• Maintenance of heating and water distribution systems in aviation ground support equipment
• Reliable operation of actuators and valve mechanisms in aircraft facilities

Compatibility & Safety Notes

• Compatible with most metals, thermoplastics, and elastomers; verify compatibility with specific elastomers before large-scale use
• Not compatible with most organic solvents, strong acids, or strong alkalines
• Use standard PPE such as gloves when handling
• Follow material safety data sheet guidelines for storage and handling

Packaging & Procurement

• Available in Can 500 g and Bucket 30 kg
• Easy-to-use packaging for field or workshop applications
• Store in a dry, frost-free environment
• Suitable for both small maintenance tasks and bulk industrial applications

Why UNISILKON L 641 is Chosen for AOG / MRO

• Ensures consistent actuating forces and smooth operation in valves and taps
• High thermal and water resistance increases reliability in critical applications
• Food-safe and chemically resistant for safe incidental contact
• Versatile across multiple systems, reducing the need for multiple lubricants

Practical Suggestions for Your Team (AOG Mindset)

• Keep stock of both 500 g and 30 kg sizes for immediate availability
• Use spatula, brush, or metering devices for precise application
• Conduct compatibility checks for different elastomers in advance
• Include in preventive maintenance kits for valves and water systems

Manufacture / Aviation Spec Codes

• Manufacturer: Kl ber Lubrication
• Product ID: 022121
• NSF H1 Registration: 056 400
• Tested per: WRAS, ACS, NSF Standard 61, UBA

Alternative Names & Descriptions

• UNISILKON L 641 Grease
• Kl ber UNISILKON 641
• NSF H1 Silicone Grease L 641
• Food-Safe Valve Grease UNISILKON L 641
• Heating & Water System Lubricant L 641