2026/04/17
Acid-Resistant Seals: Best Materials for Chemical and Industrial Applications
In industrial sealing applications, choosing the right elastomer material directly affects equipment reliability, service life, and maintenance costs. Among the most widely used sealing materials, NBR seals and Viton FKM seals are two common options for hydraulic systems, automotive components, chemical processing equipment, and industrial machinery. Understanding the differences between these materials helps engineers and procurement teams select the most suitable sealing solution for demanding environments.
As a professional sealing solution manufacturer in China, HaO Seal Technology Co.,Ltd provides customized rubber sealing solutions for industries including automotive, semiconductor, photovoltaic equipment, medical systems, hydraulic machinery, and new energy vehicles.
<a href="https://www.haosealtech.com/products-487/">Nitrile Rubber (Buna-N/NBR)</a> seals are widely used because of their excellent resistance to petroleum-based oils and fuels. NBR material also offers strong mechanical properties, making it suitable for dynamic sealing applications where abrasion resistance and durability are important.
NBR seals are commonly found in:
· Hydraulic cylinders
· Pneumatic systems
· Fuel handling equipment
· Automotive engines and transmissions
· Industrial pumps and valves
One of the biggest advantages of NBR is its cost-effectiveness. For standard industrial environments with moderate temperatures and limited chemical exposure, NBR seals provide reliable performance and long service life.
However, NBR does have limitations. It is not ideal for applications involving high temperatures, ozone exposure, aggressive chemicals, or prolonged outdoor use.
<a href="https://www.haosealtech.com/products-487/">Fluorocarbon (FKM/FPM)</a>, commonly known by the brand name Viton, is a high-performance sealing material designed for extreme operating environments. FKM seals are valued for their exceptional resistance to heat, chemicals, fuels, and aggressive fluids.
Industries that frequently use FKM seals include:
· Aerospace
· Automotive & NEV systems
· Semiconductor equipment
· Chemical processing
· Oil & gas industries
· High-temperature industrial machinery
Compared with NBR, FKM seals maintain stability under significantly higher temperatures and harsh chemical exposure. This makes them a preferred choice for critical sealing systems where failure could lead to downtime or safety risks.
Temperature performance is one of the most important differences between the two materials.
· NBR seals generally operate between -40°C and 120°C
· FKM seals can handle temperatures up to 250°C in many applications
For high-temperature systems such as turbocharged engines, semiconductor equipment, or chemical reactors, FKM is usually the better option.
NBR performs well with oils and fuels but has limited resistance to strong chemicals, ozone, and weathering.
FKM seals offer excellent resistance against:
· Acids
· Solvents
· Synthetic oils
· Aggressive fuels
· Corrosive chemicals
This is why FKM is often selected for harsh industrial environments requiring long-term chemical stability.
NBR seals are more economical and suitable for large-volume industrial applications where operating conditions are relatively standard.
FKM seals are more expensive due to their advanced material properties and manufacturing requirements. However, their longer lifespan and reduced maintenance frequency can lower overall operational costs in demanding applications.
NBR materials typically provide excellent flexibility and wear resistance in hydraulic and pneumatic systems.
FKM materials are slightly less flexible at very low temperatures but compensate with superior heat and chemical resistance.
The correct seal material depends on several operational factors:
· Operating temperature
· Media compatibility
· Pressure conditions
· Environmental exposure
· Required service life
· Industry compliance standards
For general industrial machinery and hydraulic systems, NBR seals remain a practical and reliable choice. For extreme temperatures, aggressive chemicals, or high-performance applications, FKM seals offer superior durability and stability.
As an experienced rubber seal manufacturer and supplier, HaO Seal Technology Co.,Ltd develops customized sealing solutions based on specific industry requirements. The company supports a wide range of elastomer materials including <a href="https://www.haosealtech.com/products-487/">EPDM</a>, <a href="https://www.haosealtech.com/products-487/">HNBR</a>, PTFE, silicone rubber, FFKM, and polyurethane for various industrial sealing applications.
Established in 2010, HaO Seal Technology Co.,Ltd has built strong expertise in research, development, and manufacturing of precision rubber seals for global customers. The company continuously upgrades its R&D capabilities and production technologies to meet the evolving demands of advanced industries.
Key application sectors include:
· Photovoltaic equipment
· Semiconductor manufacturing
· Inkjet marking systems
· Automotive & new energy vehicles
· Hydraulic and pneumatic systems
· Medical and sanitary industries
With advanced manufacturing processes, strict quality control, and customized engineering support, HaO Seal Technology delivers reliable sealing solutions for both standard and complex industrial applications worldwide.
