描述
Krytox XHT-S Grease is an extreme high-temperature PFPE (perfluoropolyether) grease from Chemours‘ Krytox performance lubricants portfolio, genuinely manufactured by Chemours and imported as original product. As an authorized distributor and trader, we supply genuine material with full traceability and direct access to official Chemours technical documentation. For more product options and company information, please visit our website at https://szrqchem.com/.
Krytox XHT-S Grease is a special high-temperature grease with low oil evaporation that provides long bearing life and is compatible with most elastomers and plastics. The base oil is an extremely viscous PFPE oil (500 cSt at 40°C) that provides good viscosity retention and lower evaporation at high temperatures. PTFE is the standard thickener, and the grease is made to a standard NLGI Grade 2.
The Krytox XHT-S series is an extension of the Krytox GPL 240 series and GPL 20X series, designed to give higher performance in the 204–302°C (400–575°F) range. While most petroleum-based products degrade below 99°C (210°F), Krytox XHT-S Grease operates continuously from -20°C to 300°C (-4°F to 572°F) and is designed to work best at temperatures over 200°C (400°F). The grease is nonflammable, oxygen-compatible, and chemically inert.
Krytox XHT-S Grease contains no additives and is used where a potential for interaction between process chemicals and grease additives exists. It is not FDA compliant and is not intended for food contact applications.
Key Features of Krytox XHT-S Grease
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No Additives – Contains no additives, making it ideal for applications where there is a potential for chemical–lubricant interaction between process steps
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Extreme High-Temperature Performance – Continuous operation from -20°C to 300°C (-4°F to 572°F), designed for best performance above 200°C (400°F)
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Low Oil Evaporation – Maximum volatility of <1% after 22 hours at 204°C (400°F), minimizing lubricant loss and extending performance in extreme heat
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Nonflammable & Oxygen-Compatible – Will not burn or support combustion, even in pure oxygen environments
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Chemically Inert & Nonreactive – Completely inert, providing incredible durability in extreme environments where traditional lubricants degrade, burn, or entirely evaporate
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Excellent Material Compatibility – Compatible with most elastomers and plastics
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Extended Lubrication Intervals – Provides longer equipment life and reduced maintenance frequency
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High Viscosity Base Oil – 500 cSt at 40°C provides good viscosity retention at high temperatures
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Low Surface Tension – Promotes effective wetting of metallic surfaces
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Shear Stable – Maintains consistency under mechanical stress
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Nonvolatile & Nonoxidizing – Provides long-term stability in extreme environments
Typical Applications for Krytox XHT-S Grease
| Industry | Typical Components & Considerations |
|---|---|
| Bearings | Paint plant conveyor bearings; corrugator and paper machine bearings; aluminum can manufacturing bearings; textile calender roll bearings; brick kiln car bearings; ventilation fan bearings |
| High-Temperature Ovens & Furnaces | High-temperature fans; conveyor systems in glass and aluminum plants; tenter frames |
| Valves | Valve lubrication; high-temperature valve and control systems |
| Welding Equipment | Welding machines |
| Textile Equipment | Textile equipment, dryer cans, process rolls |
| Gaskets | Gasket lubrication |
| Rod Mills | Rod mill applications |
| Metal Processing | Metal processing equipment |
| General Industrial | Applications where potential for chemical–lubricant interaction exists; extreme environments where traditional lubricants degrade, burn, or evaporate |
Material Advantages
Krytox XHT-S Grease is a high-performance PFPE grease that delivers:
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No Additives – The absence of additives makes XHT-S ideal for applications where there is a potential for interaction between process chemicals and grease additives. This is a key differentiator from XHT-AC and XHT-ACX, which contain sodium nitrite additives for anti-wear and rust protection.
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Unmatched High-Temperature Capability – Continuous operation from -20°C to 300°C (-4°F to 572°F) with best performance above 200°C (400°F), far exceeding the capabilities of conventional greases
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Lowest Additive-Free Evaporation – Volatility of <1% after 22 hours at 204°C (400°F)
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Inherent Safety – Nonflammable, oxygen-compatible, and chemically inert, making it safe for use in oxygen-rich, chemical, and extreme thermal environments
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Extended Service Life – Low evaporation and high thermal stability reduce the need for frequent relubrication, lowering maintenance costs and downtime
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Excellent Material Compatibility – Compatible with most elastomers and plastics
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High Viscosity Retention – The 500 cSt base oil provides good viscosity at elevated temperatures
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Chemical Inertness – Completely inert, making XHT-S an ideal lubricant when there is a potential for chemical–lubricant interaction between process steps
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Proven Performance – An extension of the Krytox GPL 240 series and GPL 20X series, designed for higher performance in the 204–302°C (400–575°F) range
Chemours, as the inventor of Krytox, brings decades of PFPE lubricant expertise, ensuring batch-to-batch consistency, reliable supply, and full technical support.
Typical Properties
| Property | Krytox XHT-S Grease | Unit / Remarks |
|---|---|---|
| Product Type | PFPE Extreme High-Temperature Grease | – |
| Appearance | White, creamy consistency | – |
| NLGI Grade | 2 | – |
| Base Chemistry | Perfluoropolyether (PFPE) | – |
| Thickener Type | Polytetrafluoroethylene (PTFE) | – |
| Base Oil Viscosity @ 20°C | 1,712 cSt | – |
| Base Oil Viscosity @ 40°C | 500 cSt | – |
| Base Oil Viscosity @ 100°C | 47 cSt | – |
| Oil Viscosity Index | 149 | – |
| Oil Pour Point | -25°C (-13°F) | – |
| Vapor Pressure @ 20°C | ≤1 x 10⁻⁹ torr | Knudsen |
| Vapor Pressure @ 100°C | ≤8 x 10⁻⁷ torr | Knudsen |
| Vapor Pressure @ 200°C | ≤1 x 10⁻⁴ torr | Knudsen |
| Max Volatility (22 hrs @ 204°C) | <1% | ASTM D2595 |
| Specific Gravity @ 0°C | 1.99 | – |
| Estimated Useful Range | -20°C to 300°C (-4°F to 572°F) | – |
| PTFE Thickener Stability | Below 320°C (608°F) | – |
| Food Contact Approval | None | Not FDA compliant |
| Additives | None | – |
| Chemical Behavior | Nonflammable, oxygen-compatible, chemically inert | – |
| CAS Number | 68153-81-1 | – |
| Packaging | 57 g syringe; 2 oz, 8 oz tubes; 0.5 kg, 1 kg jars; 5 kg, 20 kg pails | – |
| Country of Origin | USA | – |
Important Notes on Typical Data:
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Values listed are typical and sourced from Chemours official data sheets. They do not constitute binding product specification.
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Batch-to-batch deviations may exist. For critical applications, validate performance with batch-specific COA certificate.
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Final performance depends on application conditions, operating environment, and relubrication intervals.
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Chemours official TDS shall serve as definitive technical reference. Request the latest official TDS from our sales team.
XHT-S vs XHT-SX vs XHT-AC vs XHT-ACX Comparison
| Property | XHT-S | XHT-SX | XHT-AC | XHT-ACX |
|---|---|---|---|---|
| NLGI Grade | 2 | 2 | 2 | 2 |
| Estimated Useful Range | -20°C to 300°C | -10°C to 300°C | -20°C to 300°C | -10°C to 300°C |
| Base Oil Viscosity @ 40°C | 500 cSt | 738 cSt | 500 cSt | 738 cSt |
| Base Oil Viscosity @ 100°C | 47 cSt | 65 cSt | 47 cSt | 65 cSt |
| Oil Viscosity Index | 149 | 158 | 149 | 158 |
| Oil Pour Point | -25°C | -15°C | -25°C | -15°C |
| Max Volatility (22 hrs @ 204°C) | <1% | <0.75% | <1% | <0.75% |
| Additives | None | None | Sodium Nitrite | Sodium Nitrite |
| Antirust Rating | No | No | Pass | Pass |
| NSF H-1 | None | Yes | Yes | Yes |
| Key Feature | No additives, base model | Higher viscosity, NSF H-1 | Anti-corrosion, NSF H-1 | High viscosity, anti-corrosion, NSF H-1 |
Processing & Application Guidelines
| Consideration | Details |
|---|---|
| Application | Apply to clean surfaces. Grease should be applied using standard grease application equipment (grease gun, automatic lubricators, or manual application). Ensure surfaces are free from contaminants before application |
| Temperature Range | Designed for best performance above 200°C (400°F); continuous operation up to 300°C (572°F) |
| Thickener Stability | Should be used below 320°C (608°F), where the PTFE thickener could begin to melt |
| Chemical Environment | Contains no additives; ideal for applications where potential for interaction between process chemicals and grease additives exists |
| Storage | Store in original, sealed containers in a cool, dry place away from direct sunlight |
| Shelf Life | Extended shelf life; refer to product packaging for specific expiration date |
Critical Application Warnings:
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Not for Food Contact: Krytox XHT-S Grease is not FDA compliant and has no food contact approval. Do not use in applications requiring food-grade lubricants.
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No Additives: XHT-S contains no additives. For applications requiring anti-wear or rust protection, consider XHT-AC or XHT-ACX.
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Temperature Considerations: While the grease can withstand temperatures up to 300°C continuously, the PTFE thickener begins to melt above 320°C (608°F).
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Surface Preparation: Ensure clean application surfaces to maximize lubricant adhesion and performance.
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Material Compatibility: Compatible with most elastomers and plastics. However, always verify compatibility with specific materials in your application.
Related Products
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Explore Krytox XHT Series – Browse all Krytox XHT extreme high-temperature lubricants
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Explore Krytox Lubricants – Browse all Krytox performance lubricant options
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About Our Company – Learn more about our supply capabilities and quality assurance
Technical Documents
| Document Type | Description & Source |
|---|---|
| Chemours Official TDS | Complete physical, thermal, and mechanical properties of Krytox XHT-S Grease, issued by Chemours original |
| Chemours Official SDS | GHS-compliant chemical safety documentation, original Chemours document |
| Chemours Distributor Authorization Certificate | Proof of our authorized-distributor qualification for Chemours Krytox series, available upon request |
| COA (Certificate of Analysis) | Batch-specific quality certification |
Request any document above by:
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Email:
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Online form: Our contact page
We reply within one working business day. Please clearly state product (Krytox XHT-S Grease) and document type you require.
FAQ
Q1: What is Krytox XHT-S Grease and what is it used for?
A: Krytox XHT-S Grease is an extreme high-temperature PFPE grease from Chemours. It is formulated for continuous operation from -20°C to 300°C (-4°F to 572°F) with low oil evaporation (<1% at 204°C). It contains no additives, making it ideal for applications where there is a potential for chemical–lubricant interaction. It is widely used in bearings, valves, high-temperature ovens, textile equipment, welding machines, and other extreme thermal applications.
Q2: What is the NLGI grade of Krytox XHT-S Grease?
A: Krytox XHT-S Grease has an NLGI grade of 2.
Q3: What is the base oil viscosity of Krytox XHT-S Grease?
A: The base oil viscosity is 500 cSt at 40°C and 47 cSt at 100°C.
Q4: Does Krytox XHT-S Grease contain additives?
A: No. Krytox XHT-S Grease contains no additives. It is used where a potential for interaction between process chemicals and grease additives exists.
Q5: Is Krytox XHT-S Grease FDA compliant?
A: No. Krytox XHT-S Grease has no food contact approval and is not FDA compliant. It is suitable for industrial applications where food-grade certification is not required.
Q6: Is Krytox XHT-S Grease flammable?
A: No. Krytox XHT-S Grease is nonflammable, oxygen-compatible, and chemically inert. It will not burn or support combustion, even in oxygen-rich environments.
Q7: What is the maximum operating temperature of Krytox XHT-S Grease?
A: Continuous service up to 300°C (572°F), with PTFE thickener stability up to 320°C (608°F). Best performance is above 200°C (400°F).
Q8: What is the volatility of Krytox XHT-S Grease?
A: The grease has a maximum volatility of <1% after 22 hours at 204°C (400°F).
Q9: What is the difference between XHT-S and XHT-SX?
A: XHT-SX has a higher base oil viscosity (738 cSt vs 500 cSt at 40°C), higher viscosity index (158 vs 149), lower volatility (<0.75% vs <1%), and a narrower low-temperature range (-10°C vs -20°C). XHT-SX is also NSF H-1 registered for incidental food contact, while XHT-S has no food contact approval.
Q10: What is the difference between XHT-S and XHT-AC?
A: XHT-S contains no additives, while XHT-AC contains sodium nitrite additives for anti-wear and rust protection. XHT-AC is also NSF H-1 registered for incidental food contact. XHT-S is the base model for applications where additives are not desired.
Q11: What packaging options are available for Krytox XHT-S Grease?
A: Available in 57 g syringe; 2 oz and 8 oz tubes; 0.5 kg and 1 kg jars; as well as 5 kg and 20 kg pails.
Q12: What is the shelf life of Krytox XHT-S Grease?
A: Krytox XHT-S Grease has an extended shelf life when stored in unopened, proper conditions. Refer to product packaging for specific expiration dates.
Q13: What is the CAS number of Krytox XHT-S Grease?
A: The CAS number is 68153-81-1.
Q14: What is the lead time for orders?
A: Regular orders ship within 7-10 working days after payment confirmation. Large-volume or urgent orders can be negotiated separately.
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Sample Policy:
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Samples are for laboratory validation tests only, not for production use.
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Buyer bears international sample-shipping freight.
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If bulk-product performance deviates from sample reference, Chemours official TDS serves as the authoritative benchmark.
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After-Sales Support
| Service | Details |
|---|---|
| Quality Inspection Period | All quality-related claims must be submitted within 7 working-days after delivery, supported by test data and photographic evidence. |
| Return / Exchange Policy | Confirmed product defects caused by our side trigger replacement or refund. Terms and conditions apply. |
| Logistics Damage | Report shipping damage directly to carrier immediately upon goods receipt. We assist with claim-document preparation. |
| Technical Support | Remote technical guidance available. On-site troubleshooting can be arranged upon special request. |
| Export Documentation | We supply commercial invoice, packing list, bill of lading, COA, and additional compliance certificates on request. |
Disclaimer
DISCLAIMER: All technical data is referenced from original Chemours typical values for Krytox XHT-S Grease. Our company acts as authorized distributor/trader rather than original manufacturer. Final performance depends on application conditions, operating environment, and maintenance practices. Buyers shall independently validate product suitability for individual applications. Our firm bears no liability for lubricant failure caused by improper application or improper usage. Always reference the latest Chemours official TDS of Krytox XHT-S Grease as the definitive specification.
