Silicone Gasket with PTFE Film
Silicone gaskets with PTFE (Polytetrafluoroethylene) film combine the elasticity of silicone rubber with the chemical resistance and low friction of PTFE. This hybrid design ensures reliable sealing performance in high-temperature, corrosive, and chemically aggressive environments, making it ideal for pharmaceutical, food, chemical processing, and laboratory applications.
1. Product Overview
The PTFE film is laminated on one or both sides of the silicone gasket, providing a protective barrier against harsh chemicals, oils, and solvents while maintaining the compressibility and resilience of silicone. This design minimizes sticking to flange surfaces and improves gasket longevity.
- Enhanced chemical resistance against acids, bases, and solvents
- Excellent high-temperature performance up to 230°C
- Low friction surface reduces sticking and extrusion
- Maintains flexibility and compressibility for tight seals
Design Advantage: PTFE film protects the gasket from flange corrosion and chemical attack, ensuring stable long-term sealing performance.
2. Material Characteristics
| Property | Silicone Rubber | PTFE Film | Benefit |
|---|---|---|---|
| Temperature Resistance | -60°C to +230°C | -200°C to +260°C | High-temperature sealing without degradation |
| Chemical Resistance | Moderate | Excellent | Protection against aggressive chemicals |
| Compression Set | Low | N/A | Maintains sealing force over time |
| Friction | Moderate | Very Low | Prevents sticking, easy assembly/disassembly |
3. Manufacturing Process
Silicone gaskets with PTFE film are typically produced by combining silicone molding with lamination or co-extrusion techniques.
- Compression Molding: Ensures precise thickness and uniform bonding of PTFE film
- Die Cutting: Cost-effective for flat sheet gaskets with laminated PTFE
- Coating or Laminating: PTFE film is bonded using heat and pressure to ensure strong adhesion
Process Tip: PTFE film must be handled carefully to avoid delamination or surface scratches that can compromise sealing.
4. Key Performance Tests
4.1 Chemical Resistance Test
- Check for swelling, softening, or degradation after immersion
- Ensures long-term sealing in chemical environments
4.2 Compression Set Test
- Measures the gasket's ability to recover after prolonged compression
4.3 Leak Test
- Ensures tight sealing under pressure and temperature cycles
5. Typical Applications
- Pharmaceutical and laboratory equipment
- Food and beverage processing machinery
- Chemical reactors and piping systems
- High-temperature flange connections
- Corrosion-resistant sealing in aggressive media
6. Installation and Maintenance Guidelines
- Ensure mating flange surfaces are smooth and clean
- Do not over-compress; follow recommended torque specifications
- Avoid sharp objects that can damage PTFE film surface
- Inspect gaskets during scheduled maintenance for wear or delamination
Maintenance Tip: Replace gaskets showing PTFE delamination, cracks, or permanent compression set to ensure continuous leak-free operation.
7. Why Choose Our Custom Rubber Gaskets
❶.Precision Manufacturing Excellence
- Burr-Free & High Precision: Smooth edges, tight tolerances (±0.05mm to ±0.20mm), accurate dimensions for easy installation and reliable sealing
- Advanced Equipment: State-of-the-art die cutting, molding presses, CNC machines, and inspection systems
- Skilled Workforce: Experienced engineers and technicians with decades of sealing expertise
❷.Superior Sealing Performance
- Leak-Proof Reliability: Maintains sealing integrity under pressure, temperature variations, and chemical exposure
- Long Service Life: Low compression set materials ensure sustained sealing force over years of operation
- Wide Operating Range: Materials available from -60°C to +320°C and pressures up to 40 MPa
❸.Cost-Effective Solutions
- Factory Direct Pricing: No intermediaries, competitive pricing without compromising quality
- Flexible MOQ: Support for small batch prototypes to large volume production
- Reduced Total Cost: Longer gasket life means fewer replacements and less downtime
❹.Comprehensive Customization
- One-Stop Custom Solutions: From concept to delivery, we handle all aspects of custom gasket development
- Material Expertise: 20+ elastomer compounds and special formulations available
Packaging & Shipping
📦 Packaging Options：
Standard Packaging:
- Sealed PE bags
- Inner cartons with protective layers
- Pallet packing for bulk shipment
Custom Packaging (Available on request):
- Small pouch / small bag packing
- Individual heat-sealed plastic bag with cardboard backing
- Individual bubble-wrap protection
- Light-proof black packaging
- Customized labeling or barcodes
🚚 Shipping Methods
- DHL / FedEx / UPS express
- Air freight for urgent orders
- Sea freight for bulk orders
- FOB / CIF / DDP trade terms available
Certification
Our gaskets comply with major international standards, including:
ISO 9001, ASTM D2000, FDA, NSF, WRAS, RoHS, REACH, CE, UL.
All materials are fully tested for physical, chemical, and hygienic performance to ensure long-term reliability in sanitary and industrial systems.
Medical rubber gaskets provide stable, clean, and safe sealing performance for the most demanding healthcare environments, supporting long-term reliability and product integrity.
Contact US：
Xiamen Best Seal Imp and Exp Co.,Ltd
Tel: +86-592-5782315
Mob: +8618950159396
Email: yunying2@bestsealhk.com
Add: Unit 522-525, Gaodian Road 6#, Huli District, Xiamen, China
Conclusion
Silicone gaskets with PTFE film provide a combination of elasticity, chemical resistance, and low friction for demanding sealing applications. They are ideal for high-temperature, chemically aggressive environments where both performance and durability are critical.
About Us
Best Seal provides custom silicone gaskets with PTFE film in various sizes, thicknesses, and hardness levels to meet diverse industrial and sanitary requirements.
- Custom OD/ID and bolt hole patterns
- Food-grade and chemical-grade options
- OEM and aftermarket support
- ISO 9001 quality assurance
Why choose us?
- We have a wide range of Rubber Gaskets that can be customized to meet the specific needs of our customers.
- We are the first to solve customers' worries and enhance the competitiveness of our partners in the market.
- We can provide customized packaging solutions for our Rubber Gaskets to meet the unique needs of our customers.
- Through the exploration and friction of all employees in the actual work, the company has gradually clarified the common values and vision, thus forming a corporate culture system that is recognized by the majority of employees.
- We have a team of highly skilled professionals who are dedicated to producing high-quality Rubber Gaskets.
- We always believe that customer satisfaction and recognition is an important yardstick to measure our work performance.
- We have a strict quality control process in place to ensure our Rubber Gaskets meet the highest standards of quality.
- We take high-quality raw materials and intelligent flexible production as the cornerstone, "form obeys function" as the design concept, and intelligent technology as the innovative concept to provide customers with customized solutions for Silicone Gasket With PTFE Film products.
- We offer a wide variety of Rubber Gaskets to meet the diverse needs of our customers.
- Our group is committed to providing global customers with solutions that meet their needs and achieve a win-win situation between enterprises and users.
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