850G Series Acid Primer – Teflon PTFE Acid Primer System for Industrial Applications

The 850G Series Acid Primer is a water/acid-based, two-component PTFE 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. For more product options and company information, please visit our website at https://szrqchem.com/.

The 850G Series is a family of acid primers specifically engineered as the foundational layer for PTFE, PFA, and FEP topcoat systems. These primers are available in multiple colors including Clear (850G-300), Green (850G-314), and Gray (850G-321), with a water/acid carrier. The acid primer system is designed to provide exceptional adhesion between the substrate and fluoropolymer topcoats, which inherently have weak adhesion to metal surfaces. Primers effectively prepare surfaces before coating application by creating a protective layer over the substrate that decreases the porosity of the coating so that it is not absorbed by the substrate.

Critical to note: The 850G Series primers are two-component systems that must be activated with 850-7799 Acid Accelerator before use. 850G-3xx does not contain any other polymer than PTFE, and the adhesion on the substrate results from a chemical reaction of the acid accelerator with the metal. This activation process is essential for the primer to achieve its full adhesion and performance properties. The activated primer serves as a robust “bridge” between the substrate (aluminum, steel, stainless steel, etc.) and the PTFE/PFA/FEP topcoat, fundamentally preventing coating delamination and ensuring long-term durability of the coating system.

The 850G Series acid primers are suitable for applications where FDA compliance is not required. They are widely used in industrial applications requiring exceptional adhesion, chemical resistance, and thermal stability up to 260°C (500°F).

Key Models in the 850G Series

Note: 850G-204 is a pre-mixed, single-component acid primer that does not require the 850-7799 accelerator and has a shorter shelf life at room temperature.

Key Features of 850G Series Acid Primer

• Two-Component Acid Primer System – Requires activation with 850-7799 Acid Accelerator to achieve optimal adhesion and performance. The adhesion results from a chemical reaction of the acid accelerator with the metal substrate.

• Exceptional Adhesion – Acts as a robust “bridge” between the substrate and PTFE/PFA/FEP topcoats, fundamentally preventing coating delamination and ensuring long-term durability.

• Multiple Color Options – Available in Clear (850G-300), Green (850G-314), and Gray (850G-321) to suit various application requirements.

• Broad Topcoat Compatibility – Suitable for use with PTFE, PFA, and FEP topcoat systems.

• High Temperature Resistance – Maximum continuous service temperature up to 260°C (500°F).

• Excellent Chemical Resistance – Provides additional corrosion protection when combined with fluoropolymer topcoats.

• Enhanced Durability – By improving adhesion, the primer significantly extends the overall service life of the coating system.

• Optimized Surface Preparation – Creates a smooth, well-adhered layer that allows the topcoat to distribute evenly, resulting in better smoothness and nonstick properties.

Typical Applications for 850G Series Acid Primer

Note: The 850G Series is not FDA compliant for food contact applications. For food contact applications, please refer to FDA-compliant primer options such as 857G-030 or 858-100 series.

Material Advantages

The 850G Series Acid Primer is a water/acid-based PTFE primer that delivers:

• Superior Adhesion – As an acid primer, it provides exceptional bonding between the substrate and fluoropolymer topcoats, which inherently have weak adhesion to metal surfaces. The adhesion results from a chemical reaction of the acid accelerator with the metal.

• Activation Chemistry – The two-component system with 850-7799 Acid Accelerator ensures optimal chemical bonding and performance.

• Chemical Inertness – PTFE-based formulation provides excellent resistance to chemicals and corrosion.

• Thermal Stability – Maintains performance at continuous service temperatures up to 260°C (500°F), the highest of any fluoroplastic.

• Broad Topcoat Compatibility – Suitable for use with PTFE, PFA, and FEP topcoat systems.

• Optimized Surface – A smooth, well-adhered primer layer allows the subsequent topcoat to distribute more evenly, resulting in better smoothness and nonstick properties.

Chemours, as the inventor of Teflon™, brings over 80 years of fluoro-polymer expertise, ensuring batch-to-batch consistency, reliable supply, and full technical support.

Typical Properties

*Coverage values based on 100% application efficiency at 25 µm DFT.

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 only and may vary up to ±5%.

• 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

Critical Processing Warnings:

• Activation Required: 850G Series primers are two-component systems and MUST be activated with 850-7799 Acid Accelerator before use. Failure to activate will result in poor adhesion and coating failure.

• Surface Preparation: Proper surface preparation is critical for adhesion. Ensure surfaces are clean, dry, and properly roughened.

• Pot Life: Once activated, the primer has a limited pot life. The mixture should be used within a few days and stored at 4°C. If stored above this temperature, the mixture may release gas, causing pressure buildup in the container.

• Primer as Foundation: The primer serves as the critical foundation for the entire coating system. Proper application and curing are essential for optimal adhesion and durability.

• Topcoat Compatibility: 850G Series primers are suitable for use with PTFE, PFA, and FEP topcoat systems.

• Not FDA Compliant: This primer is not FDA compliant for food contact applications. For food contact applications, use FDA-compliant primers such as 857G-030 or 858-100 series.

• Storage: Unactivated 850G-3xx primer and 850-7799 accelerator can be stored for 18 months at 18-21°C. Activated mixture should be stored at 4°C and used within a few days. Waterborne products must be protected from freezing.

• Safety: When opening stored containers of activated primer, exercise caution as pressure may have built up.

Related Products

• Explore Teflon PTFE Coatings – Browse all Teflon industrial coating options

• 850G-300 Clear – Teflon PTFE Acid Primer – Clear acid primer for PTFE, PFA, and FEP topcoat systems

• 953G-506 Dark Violet – FEP Waterborne Primer – FEP primer for multi-coat food contact systems

• About Our Company – Learn more about our supply capabilities and quality assurance

Technical Documents

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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 Series Acid Primer) and document type you require.

FAQ

Q1: What is the 850G Series Acid Primer and what is it used for?
A: The 850G Series is a family of water/acid-based, two-component PTFE primers from the Teflon industrial coatings portfolio. Available in Clear (850G-300), Green (850G-314), and Gray (850G-321), these primers serve as the foundational layer for PTFE, PFA, and FEP topcoat systems, providing exceptional adhesion between the substrate and fluoropolymer topcoats.

Q2: Is the 850G Series Acid Primer FDA compliant?
A: No. The 850G Series primers are not FDA compliant for food contact applications per 21CFR. For food contact applications, please use FDA-compliant primers such as 857G-030 or 858-100 series.

Q3: Does the 850G Series Acid Primer require activation?
A: Yes. The 850G Series primers are two-component systems that MUST be activated with 850-7799 Acid Accelerator before use. The accelerator is essential for the primer to achieve proper adhesion and performance.

Q4: What are the mixing ratios for activation?
A: For grit-blasted surfaces: 100 parts 850G-3xx + 35 parts 850-7799 (by volume) / 100 parts + 32 parts (by weight). For smooth surfaces: 100 parts + 40 parts (by volume) / 100 parts + 36 parts (by weight).

Q5: What is the difference between 850G-300, 850G-314, and 850G-321?
A: The primary difference is the color: 850G-300 is Clear, 850G-314 is Green, and 850G-321 is Gray. All three share similar performance characteristics as acid primers for PTFE/PFA/FEP systems.

Q6: What topcoats are compatible with the 850G Series Acid Primer?
A: The 850G Series primers are suitable for use with PTFE, PFA, and FEP topcoat systems.

Q7: What is the maximum service temperature of the 850G Series Acid Primer?
A: The maximum continuous service temperature is 260°C (500°F).

Q8: What is the shelf life of the 850G Series Acid Primer?
A: Unactivated primer and accelerator can be stored for 18 months at 18-21°C. Once activated, the mixture should be used within a few days and stored at 4°C.

Q9: What is the recommended primer film thickness?
A: The recommended primer DFT is 5 – 10 µm (0.2 – 0.4 mil).

Q10: 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.

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• Substrate type (grit-blasted or smooth surface)

• 850-7799 Acid Accelerator requirement

• Document requirement (TDS, SDS, COA, etc.)

Sample Policy:

• Samples are for laboratory validation tests only, not for production use.

• Buyer bears international sample-shipping freight.

• If bulk-product performance deviates from sample reference, Chemours official TDS serves as the authoritative benchmark.

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Disclaimer

DISCLAIMER: All technical data is referenced from original Chemours typical values for the 850G Series Acid Primer. 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 Chemours official TDS of the 850G Series Acid Primer as the definitive specification.