BF2520 Rubber Coated Metal Material (RCM)

BF2520 is a typical metal rubber coating material, which is mainly used for manufacturing multi-layer cylinder head gaskets. The rubber coating is high temperature resistant fluorine rubber coating, and the metal core is stainless steel 301. Material overall thickness is 0.25mm. We also call this material soft metal material, which is made of thin iron plate, stainless steel plate, aluminum plate or other metal plate coated with synthetic rubber on its surface. It combines the rigidity of metal and the elasticity of rubber. It can be used to make automotive parts, machine parts, electronic equipment parts. And can be used as sound insulation and vibration prevention materials. The short-term maximum operation temperature for BF2520 could up to 250℃.

Specs of BF2520 Rubber Coated Metal Material (RCM)

Rubber TypeFKM
Base Metal TypeSUS301
Surface AppearanceSemi-luster black
Overall Thickness (mm)0.25±0.02
Base Matel Thickness(mm)0.20±0.01
Rubber Coating Thickness(mm)0.03±0.005 (Per side)
Max . Operation Temp (℃)≤300℃
Rating Adhesion Test ASTM-D3359100% residual
Pull Off Test (Mpa) ASTM-D4541-09≥1.4
Base Metal Hardness (HV)430 ~ 470



Shore A duromete (Points)
ASTM D-2240
70 ~ 80
Tensile Strength Mpa (Min.)
ASTM D-412
Ultimate Elongatoin ( % min)
ASTM D-412
Heat Aged
(70 hrs@100℃)
Change in Durometer hardness (Points)
ASTM D-573
—15 ~ 15
Change in Tensile Strength ( % max. )
ASTM D-573
—30 ~ 30
Volume Change (% max.)
Oil IRM 903, ASTM D-471

BF2520 Rubber Coated Metal Material (RCM) Schematic View

BF2520-301 Rubber Coated Metal Material(RCM) Schematic View

Rubber Coatings of BF2520 Rubber Coated Metal Material (RCM)

Nitrile Butadiene Rubber (NBR)a synthetic rubber with excellent resistance to oils, coolant, fuel, refrigerant, and other fluids. NBR offers superior abrasion resistance for metal-steel adhesion. Heat resistance up to 200↑in campe state action
Nitrile Butadiene Rubber (NBR) FoametThe same characteristics of NBR, with the special benefit of higher conformance to rough sealing surfaces and lower clamp load applications.
Fluoroelastomer Rubber (FKM)Superior heat resistance and fluid immersion performance. Heat resistant up to 250*C in clamped state applications.

Metal Cores of BF2520 Rubber Coated Metal Material (RCM)

Stainless Steel

SUS301, 3% Hard, Full Hard.


Cold Rolled SteelSPCC,1/4 Hard. C490

Release Surface Coating of BF2520 Rubber Coated Metal Material (RCM)

PTFEHigh-performance surface coating
ResinAnti-stick Coating

Features of BF2520 Rubber Coated Metal Material (RCM)

  • High Temperature Resistance: Fluorine rubber can maintain good performance at high temperatures, and can work for a long time at 200 ℃~250 ℃.

  • Oil Resistance: Fluorine rubber has excellent oil resistance, and can seal inorganic acids, organic solvents and other chemical substances.

  • High Vacuum And A Variety Of Chemicals Resistance: Fluorine rubber in high temperature, high vacuum and a variety of chemicals in the environment can still maintain good performance.

  • Corrosion Resistance: Fluorine rubber has high chemical stability, strong corrosion resistance, can be used in a variety of chemical industry.

  • Atmospheric Aging Resistance: Fluorine rubber is not easy to age in the air, long-term exposure in the air will not harden or soften.

  • Good Physical And Mechanical Properties: Fluorine rubber has advantages in resilience, compressive strength, elongation at break and so on.

Applications of BF2520 Rubber Coated Metal Material (RCM)

Applications of BF2520 Rubber Coated Metal Material(RCM)

Rubber coated metal material (RCM) have a wide range of applications.

1. Automotive industry: RCM can be used to make auto parts, such as gaskets, shock absorber parts, suspension system parts, etc. Because of the good flexibility and wear resistance of metal rubber composites, it can effectively dampen and absorb the vibration caused by road bumps, improve driving comfort and stability. At the same time, metal rubber can also prevent water, dust and other external substances from entering the interior of the car, improve the sealing of the car.  In addition, the processing technology of metal rubber coatings can also be extended from the bonding of rubber and metal to the bonding of rubber and plastic and fiber fabric. With the increase of the types of composite products and the expansion of the application field, the requirements for bonding technology are becoming higher and higher, and the application prospect of metal rubber coatings is broad.

2. Industrial Machinery: This material can be used for sealing components in heavy machinery that operate under harsh conditions, such as turbines, boilers, and heat exchangers.

3. Oil and Gas Industry: BF2520 can be used in the production of seals and gaskets for pipelines, valves, and other equipment that handle high-pressure and high-temperature fluids.

Please note that these are general recommendations based on the general operation conditions. The suitability of the material for a specific application should be determined through further testing and analysis. Always consult with Teamful Sealing materials engineer for advice tailored to your specific needs.

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