描述
850G-321 Grey is a PTFE (polytetrafluoroethylene) waterborne acid primer from Chemours’ Teflon industrial coatings 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.
This grey primer is part of the 850G-3XX series of acid primers and is designed to be used as the foundation for PTFE, PFA, and FEP topcoat systems. Unlike other primers, 850G-3XX primers do not contain any polymer other than PTFE. Adhesion to the substrate results from a chemical reaction of the acid accelerator with the metal.
850G-321 Grey must be activated with 850-7799 Acid Accelerator before use. The activated product has a short pot life at room temperature. This primer provides exceptional tolerance to less thorough surface preparation and over-curing, as well as superior corrosion protection compared to conventional primers. The grey color makes it suitable for industrial applications where visual identification and process control are important.
850G-321 Grey is not intended for direct food contact. It can also be used as a one-coat system without a topcoat in certain applications.
With regular stock availability, we support both trial orders and large‑volume bulk shipments for industrial, automotive, aerospace, chemical processing, and heavy-duty non-stick applications.
Key Features of 850G-321 Grey
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Acid Primer Technology – Chemical adhesion via acid reaction with metal substrate; contains no other polymer than PTFE
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Grey Color – Suitable for industrial applications and easy visual identification
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Exceptional Substrate Tolerance – Tolerates less thorough surface preparation (cleaning and grit blasting)
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Over-Cure Tolerance – Resists excessive curing (too high temperature and/or too long time)
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Superior Corrosion Protection – Better corrosion protection of metallic substrates than conventional primers
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Two-Component System – Must be activated with 850-7799 Acid Accelerator
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Waterborne Formulation – Low VOC emissions (53.9 g/L) for environmentally friendly processing
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High Temperature Resistance – Maximum service temperature up to 260°C (500°F)
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Versatile Compatibility – Can be used as primer for PTFE, PFA, and FEP topcoats
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One-Coat Option – Can be used as a single coat without topcoat in some applications
Typical Applications for 850G-321 Grey
| Industry | Typical Components & Considerations |
|---|---|
| Chemical Processing | Reactors, pipes, valves, storage tanks requiring corrosion protection and chemical resistance. Acid primer chemistry provides superior adhesion in aggressive environments. |
| Automotive | Seals, bearings, fasteners, components requiring low friction and durable coating adhesion. |
| Aerospace | Components requiring high temperature non-stick coatings and corrosion protection |
| Industrial Bakeware | Heavy-duty bakeware, bread pans, sheet pans requiring PTFE coating systems. |
| Cookware | High-performance non-stick cookware, ensuring coating integrity under scratch and thermal shock. |
| Mold Release | Shoe molds, rubber molds, golf ball molds, plastic molds. |
| Heat Exchangers | Coated surfaces to prevent fouling and improve efficiency. |
| General Industrial | Substrates requiring PTFE coating systems where exceptional adhesion and corrosion resistance are critical |
Explore our full range of Teflon industrial coatings for more product options.
Material Advantages of 850G-321 Grey
What makes 850G-321 Grey the preferred choice for PTFE coating primer applications? Below are its core practical advantages:
Unique Acid Primer Chemistry for Superior Adhesion
Unlike other primers, 850G-321 series acid primers contain no polymer other than PTFE. Adhesion is achieved through a chemical reaction of the acid accelerator with the metal substrate. This results in an exceptionally strong bond that outperforms conventional primers.
Exceptional Process Tolerance
850G-321 Grey demonstrates exceptional tolerance to less thorough substrate preparation (cleaning and grit blasting) and over-curing (excessive temperature and/or time). This makes it more forgiving in production environments where process control may vary.
Superior Corrosion Protection
Acid primers have shown better corrosion protection of metallic substrates compared to conventional primers, making them ideal for applications in aggressive chemical environments.
High Temperature Stability
With maximum service temperature of 260°C (500°F) , this primer maintains its adhesion and protective properties in high-temperature environments where conventional primers would fail.
Versatile Compatibility
850G-321 Grey can be used as a primer for PTFE, PFA, and FEP topcoats. In some applications, it can even be used as a one-coat system without a topcoat.
Waterborne, Low VOC
The waterborne formulation provides a more environmentally friendly alternative to solvent-based systems, with low VOC emissions (53.9 g/L) and easier handling.
Technical Data
| Property | 850G-321 Grey | Unit |
|---|---|---|
| Product Type | PTFE Acid Primer | – |
| Color | Grey | – |
| Carrier | Water/Acid | – |
| Coating System | Two-component (requires 850-7799 activator) | – |
| FDA Compliance | No – not for direct food contact | – |
| Coverage at 1 mil DFT | 8.55 m²/kg (12.23 m²/L, 498 ft²/gal) | – |
| Volume Solids | 28.5 – 32.5% | % |
| Weight Solids | 51.2 – 53.2% | % |
| Viscosity | 20 – 250 cP (Brookfield RVT, spindle 2, 20 RPM/25°C) | cP |
| Density | 1.43 kg/L (11.92 lbs/gal) | – |
| VOC Content | 0.449 lbs/gal (53.9 g/L) | – |
| Maximum Service Temperature | 260°C (500°F) | – |
| Flash Point | None | – |
| Application Method | Spray | – |
| Recommended DFT | 5 – 10 µm | – |
| Available Forms | Liquid waterborne | – |
| CAS Number | 9002-84-0 | – |
| Shelf Life | 18 months | – |
Important Notes on Typical Data:
Values listed are typical and sourced from Chemours official data sheets. They do not constitute binding product specification.
Physical constants are averages and may vary up to ±5% of the values shown.
Viscosity values are typical of release viscosity; these products typically increase to ~500 cP after 1 week. The viscosity will decrease to normal application limits with the addition of 850-7799 acid accelerator.
Final performance depends on substrate preparation, application method, and curing conditions.
Chemours original TDS shall serve as definitive technical reference. Request the latest official TDS from our sales team.
Processing Guidelines
| Step | Process |
|---|---|
| Activation | Mix 850G-321 with 850-7799 Acid Accelerator before use |
| Substrate Compatibility | Glass, ceramics, stainless steel, carbon steel, aluminum, and other metals |
| Surface Preparation | Degrease then abrasive blasting (recommended Ra=3-4 µm) |
| Coating Preparation | Mix for at least 30 minutes until homogeneous. Use axial mixers (propeller type). Recommended propeller diameter: 10-12 cm for 5 kg containers, 17-20 cm for 20 kg containers |
| Filtration | Filter through 100 mesh (approx. 150 µm) stainless steel or nylon screen |
| Application | Apply via conventional or HVLP spray. Recommended nozzle: 0.8-1.2 mm with air pressure 2-3 bar |
| Recommended DFT | 5 – 10 µm |
| Drying | Dry for ten minutes at 230-260°C. Drying immediately after primer application yields better final color uniformity |
| Topcoat Application | Apply PTFE, PFA, or FEP topcoat over cured primer. Recommended topcoats: 851G-XXX, 852G-XXX, 856G-XXX, 857G-XXX, 858G-XXX series |
| Pot Life | Activated product has short pot life at room temperature |
Critical Processing Warnings:
Activation Required: 850G-321 must be activated with 850-7799 Acid Accelerator before use. The activated product has a short pot life and should be used promptly.
Surface Preparation: While acid primers tolerate less thorough surface preparation, proper degreasing and grit blasting are still recommended for optimal adhesion.
Curing: Acid primers tolerate over-curing (excessive temperature and/or time), but follow recommended cure schedules for best results.
Topcoat Compatibility: 850G-321 can be used as primer for PTFE, PFA, and FEP topcoats.
One-Coat Use: May be used as a one-coat system without topcoat in certain applications.
Storage: Store in original, sealed containers in a cool, dry place away from direct sunlight.
Shelf Life: 18 months in unopened, clean, dry storage. Activated product has short pot life.
Related Products
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Explore Teflon PTFE Coatings – Browse all Teflon industrial coating options
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850G-300 Clear – PTFE Acid Primer – Clear acid primer for general purpose applications
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850G-314 Green – PTFE Acid Primer – Green acid primer for color-matched systems
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851G-214 Green – PTFE Topcoat – Standard film build, FDA compliant topcoat
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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 850G-321 Grey, 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 Teflon series, available upon request |
| COA (Certificate of Analysis) | Batch‑specific quality certification |
| Application & Usage Guide | Detailed application guidance for acid primer systems |
Request any document above by:
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Email:
ruiqingchem@gmail.com -
Online form: Our contact page
We reply within one working business day. Please clearly state product (850G-321 Grey) and document type you require.
FAQ
Q1: What is 850G-321 Grey and what is it used for?
A: 850G-321 Grey is a PTFE (polytetrafluoroethylene) waterborne acid primer from the Teflon industrial coatings portfolio. It is part of the 850G-3XX series of acid primers that achieve adhesion through a chemical reaction of the acid accelerator with the metal substrate. It is used as a primer for PTFE, PFA, and FEP topcoat systems, and can also be used as a one-coat system in some applications. It provides superior corrosion protection and exceptional tolerance to less thorough surface preparation and over-curing.
Q2: What makes 850G-321 Grey different from conventional primers?
A: Unlike conventional primers, 850G-3XX series acid primers contain no polymer other than PTFE. Adhesion is achieved through a chemical reaction of the acid accelerator with the metal. This provides exceptional tolerance to less thorough surface preparation and over-curing, as well as superior corrosion protection.
Q3: Does 850G-321 Grey require an activator?
A: Yes. 850G-321 must be activated with 850-7799 Acid Accelerator before use. The activated product has a short pot life at room temperature.
Q4: Is 850G-321 Grey FDA compliant?
A: No. 850G-321 Grey is not intended for direct food contact.
Q5: What is the maximum service temperature of 850G-321 Grey?
A: The maximum service temperature is 260°C (500°F).
Q6: What topcoats are compatible with 850G-321 Grey?
A: 850G-321 can be used as a primer for PTFE, PFA, and FEP topcoats. Recommended topcoats include 851G-XXX, 852G-XXX, 856G-XXX, 857G-XXX, and 858G-XXX series.
Q7: Can 850G-321 Grey be used as a one-coat system?
A: Yes. In some applications, 850G-3XX series primers can be used as a one-coat system without a topcoat.
Q8: What is the coverage of 850G-321 Grey?
A: Coverage is approximately 8.55 m²/kg (12.23 m²/L, 498 ft²/gal) at 1 mil DFT.
Q9: What is the shelf life of 850G-321 Grey?
A: The shelf life is 18 months when stored unactivated in original, sealed containers in a cool, dry place. Activated product has a short pot life.
Q10: What is the recommended DFT for 850G-321 Grey?
A: The recommended dry film thickness (DFT) is 5 – 10 µm.
Q11: What substrates are compatible with 850G-321 Grey?
A: Compatible substrates include glass, ceramics, stainless steel, carbon steel, aluminum, and other metals.
Q12: Can I purchase this product and what is lead‑time?
A: Yes. Submit your inquiry via our quick inquiry form or email ruiqingchem@gmail.com, specify quantity, application and delivery address. Regular orders ship within 7‑10 working days after payment confirmation. Large‑volume or urgent orders can be negotiated separately.
Q13: What are limitations?
A: 850G-321 Grey is not FDA compliant for food contact applications. It requires activation with 850-7799 Acid Accelerator before use, and the activated product has a short pot life. Always verify compatibility with specific operating conditions before use.
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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 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. Please check our full Terms & Conditions. |
| 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 coating application troubleshooting service can be arranged upon special request. |
| Export Documentation | We supply standard export documents: commercial invoice, packing list, bill of lading, COA. Additional compliance certificates can be provided on request. |
Disclaimer
DISCLAIMER: All technical data is referenced from original Chemours typical values for 850G-321 Grey. 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 latest Chemours official TDS of 850G-321 Grey as definitive specification.
