描述
Xylan 5251 is a solvent-borne, PTFE-based dip-spin fastener coating from Whitford Corporation (now PPG), part of the Xylan® 5000 Series . As an authorized distributor and trader, we supply genuine materials with full traceability and direct access to official technical documentation.
The Xylan 5000 Series was developed in the early 1980s for the automotive industry with the goal of protecting small components from corrosion using the properties of fluoropolymer coatings at a fraction of the cost of spray-applied materials . This was achieved by combining improved Xylan coatings with a bulk coating technology—dip-spin or dip-coating centrifugation—that achieves a transfer efficiency of nearly 99.9% .
Unlike Xylan 5230 (black automotive fastener coating) or Xylan 1010 (general-purpose dry-film lubricant), Xylan 5251 Silver is primarily used for fasteners that require excellent chemical resistance while maintaining a silver appearance . In terms of corrosion protection, Xylan 5251 is similar to Xylan 5230 . The material can also be used as a sealer for zinc plating, with this combination achieving extremely high corrosion resistance .
Xylan 5251 is an economical, high-performance protective solution for mass-produced small metal components, particularly fasteners . It successfully combines the excellent properties of fluoropolymers with a low-cost, high-efficiency bulk coating process and modern environmental requirements, effectively replacing and surpassing electroplated coatings .
Key Features of Xylan 5251 Coating
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Silver Appearance – Maintains a metallic silver finish, suitable for automotive fasteners where both appearance and chemical resistance are required
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Excellent Chemical Resistance – Formulated for fasteners requiring high chemical resistance
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Similar Corrosion Protection to 5230 – Comparable corrosion protection performance to Xylan 5230
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Zinc Plating Sealer – Can be used as a sealing coat over zinc plating, achieving ultra-high corrosion resistance with synergistic protection
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High Transfer Efficiency – Dip-spin process achieves nearly 99.9% coating transfer efficiency, minimizing waste
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Cost-Effective – Significantly lower cost than spray-applied fluoropolymer coatings
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Alternatives to Electroplating – Replaces and surpasses electroplated coatings (zinc, chrome) with superior performance and eliminates plating pollution issues
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Versatile Color Options – Multiple colors available to meet functional, identification, and aesthetic requirements
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Environmentally Friendly – Low VOC and chrome-free formulations available; meets EU ELV and RoHS regulations
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Excellent Adhesion – Effective adhesion to properly prepared metal substrates
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Wide Substrate Compatibility – Suitable for carbon steel, stainless steel, aluminum, and other metals
Typical Applications for Xylan 5251 Coating
| Industry | Typical Components & Considerations |
|---|---|
| Automotive Fasteners | Engine compartment bolts, chassis fasteners, exhaust system connectors – requires silver appearance and chemical resistance; resists road salt, brake fluid, and coolant |
| Building & Construction | Roofing fasteners, curtain wall bolts, steel structure connectors – weather resistance, acid rain protection, color matching |
| General Industrial | Screws, nuts, bolts, washers, clips, springs – cost-effective corrosion protection for large-volume small components |
| Zinc Plating Sealer | Zinc-plated fasteners and components – additional topcoat sealing to achieve ultra-high corrosion resistance |
| Aerospace | Structural fasteners – corrosion protection and self-lubricating performance |
Typical Properties of Xylan 5251 Coating
| Property | Typical Value | Test Method |
|---|---|---|
| Coating Type | Solvent-borne dip-spin fastener coating | — |
| Color | Silver (primarily); multiple colors available | — |
| Substrate Compatibility | Carbon steel, stainless steel, aluminum | — |
| Application Method | Dip-spin (centrifugal coating) | — |
| Transfer Efficiency | Approximately 99.9% | — |
| Dry Film Thickness | 15 – 25 μm (typical for fasteners) | — |
| Package Size | 20 kg pails | — |
| Shelf Life | 18 months | — |
Important Notes on Typical Data:
Values listed are typical and sourced from manufacturer data sheets and technical literature . They do not constitute binding product specification.
Batch-to-batch deviations may exist. For critical applications, validate performance with batch-specific COA certificate.
Final performance depends on substrate preparation, application method, and curing conditions.
Manufacturer official TDS shall serve as definitive technical reference. Request the latest official TDS from our sales team.
Processing Guidelines for Xylan 5251 Coating
| Step | Process |
|---|---|
| Surface Preparation | Degrease → grit-blast (Sa2.5, Ra 1.5–4.0 μm) → optional zinc phosphate pretreatment recommended for carbon steel |
| Coating Preparation | Low-speed mechanical stirring; dilute with manufacturer-recommended solvent |
| Application | Dip-spin (centrifugal coating) – ideal for small fasteners; or hand spray (HVLP) for larger components |
| Curing | Bake at 380–400°C (716–752°F) for 15–20 minutes (substrate temperature) |
| Storage | Store in original, sealed containers in a cool, dry place away from direct sunlight. Shelf life: 18 months |
Critical Processing Warnings:
Surface Preparation: Proper surface preparation is critical for adhesion. Degrease thoroughly and grit-blast to Sa2.5 grade with Ra 1.5–4.0 μm .
Zinc Phosphate Pretreatment: For carbon steel, zinc phosphate pretreatment is recommended to maximize corrosion resistance .
Dip-Spin Process: The dip-spin method achieves high transfer efficiency and is the recommended application method for high-volume small fastener production .
Curing: Bake at 380–400°C. Cure time depends on part mass and oven characteristics. Always verify with test pieces .
Storage: Store in original, sealed containers in a cool, dry place away from direct sunlight.
Related Products
- Explore Xylan Industrial Coatings – Browse all Xylan coating options
- About Our Company – Learn more about our supply capabilities and quality assurance
Technical Documents for Xylan 5251 Coating
| Document Type | Description & Source |
|---|---|
| Manufacturer Official TDS | Complete physical and application properties of Xylan 5251 |
| Manufacturer Official SDS | GHS-compliant chemical safety documentation |
| Distributor Authorization Certificate | Proof of our authorized-distributor qualification, available upon request |
| COA (Certificate of Analysis) | Batch-specific quality certification |
Request any document above by:
Email: ruiqingchem@gmail.com
Online form: Our contact page
We reply within one working business day. Please clearly state product (Xylan 5251) and document type you require.
FAQ about Xylan 5251 Coating
Q1: What is Xylan 5251?
A: Xylan 5251 is a solvent-borne dip-spin fastener coating from Whitford (PPG), part of the Xylan 5000 Series. It is primarily used for fasteners requiring excellent chemical resistance while maintaining a silver appearance, similar in corrosion protection to Xylan 5230 .
Q2: What is the difference between Xylan 5251 and Xylan 5230?
A: Xylan 5251 Silver is primarily formulated for fasteners requiring a silver metallic appearance and excellent chemical resistance, while Xylan 5230 is a black coating. In terms of corrosion protection, Xylan 5251 is similar to Xylan 5230 .
Q3: Can Xylan 5251 be used as a zinc plating sealer?
A: Yes, Xylan 5251 can be used as a sealing coating over zinc plating, achieving extremely high corrosion resistance through synergistic protection .
Q4: What is the dip-spin application process?
A: Dip-spin is a bulk coating process where small parts (fasteners) are immersed in the coating then centrifuged to remove excess, achieving nearly 99.9% transfer efficiency. It is ideal for mass production of small components .
Q5: What are the typical applications for Xylan 5251?
A: Typical applications include automotive fasteners (engine, chassis, exhaust), building and construction fasteners (roofing, steel structures), general industrial small components, and zinc plating sealer for fasteners .
Q6: Is Xylan 5251 environmentally friendly?
A: Xylan 5251 is part of the Xylan 5000 Series, which includes low VOC and chrome-free formulations designed to meet EU ELV and RoHS regulations, eliminating the pollution issues associated with traditional electroplating .
Q7: What is the lead time for orders?
A: Regular orders ship within 7-10 working days after payment confirmation. Large-volume 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, manufacturer 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 manufacturer typical values for Xylan 5251. Our company acts as authorized distributor/trader rather than original manufacturer. Final performance depends on substrate preparation, application method, and curing conditions. Buyers shall independently validate product suitability for individual applications. Our firm bears no liability for coating failure caused by improper application or improper usage. Always reference the latest manufacturer official TDS of Xylan 5251 as the definitive specification.
