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Sri Harini Rubber Products

Raw materials

At Sri Harini Rubber Products, we work with a wide range of rubber compounds and engineering plastics to meet different application, temperature, and performance requirements. Each material is carefully selected and can be custom-formulated based on customer needs such as hardness, flexibility, chemical resistance, and durability.

Our raw materials are broadly classified into:

  • Rubber Materials
  • Engineering Plastics

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Raw materials

sri harini rubber products

Rubber Materials

Select a rubber material to view its properties, temperature range, and capabilities.

Natural Rubber (NR)

Natural Rubber is derived from natural latex and is known for its excellent elasticity and resilience.

Key Capabilities
  • Very High flexibility and stretchability
  • Excellent abrasion and tear resistance
  • Good mechanical strength
Temperature Range
  • Approx. -50°C to +80°C
Can be modified by formulation?
  • Hardness (soft to medium)
  • Tensile strength
  • Wear resistance
Special Characteristics
  • Best choice for dynamic applications
  • Not suitable for oil, fuel, or ozone exposure

NITRILE RUBBER (NBR)

NBR is widely used for oil and fuel resistant applications.

Key Capabilities
  • Excellent resistance to oils, fuels, and greases
  • Good mechanical strength
  • Good compression set resistance
Temperature Range
  • Approx. –30°C to +120°C
Can be modified by formulation?
  • Oil resistance level
  • Hardness (50–90 Shore A)
  • Low-temperature flexibility
Special Characteristics
  • Ideal for automotive and industrial sealing parts

EPDM RUBBER

EPDM is specially designed for outdoor and weather-resistant applications.

Key Capabilities
  • Excellent resistance to heat, ozone, and UV
  • Very good weathering resistance
  • Good water and steam resistance
Temperature Range
  • Approx. –40°C to +150°C
Can be modified by formulation?
  • Heat resistance
  • Electrical insulation properties
  • Compression set
Special Characteristics
  • Not suitable for oil or fuel applications
  • Excellent for outdoor sealing

NEOPRENE RUBBER (CR)

Neoprene offers a balanced performance between oil resistance and weather resistance.

Key Capabilities
  • Moderate oil resistance
  • Good weather and ozone resistance
  • Flame resistance
Temperature Range
  • Approx. –35°C to +120°C
Can be modified by formulation?
  • Mechanical strength
  • Aging resistance
Special Characteristics
  • Used where multi-purpose performance is required

SILICONE RUBBER

Silicone rubber is known for its extreme temperature stability.

Key Capabilities
  • Excellent flexibility at very low and high temperatures
  • Good electrical insulation
  • Physiologically inert (food & medical grades)
Temperature Range
  • Approx. –60°C to +230°C
Can be modified by formulation?
  • Hardness
  • Tear strength
  • Color and transparency
Special Characteristics
  • Suitable for food, medical, and high-temperature applications

VITON® / FKM

FKM is a high-performance fluoroelastomer for extreme environments.

Key Capabilities
  • Excellent chemical and oil resistance
  • High temperature resistance
  • Low permeability to gases
Temperature Range
  • Approx. –20°C to +250°C
Can be modified by formulation?
  • Chemical resistance levels
  • Compression set
Special Characteristics
  • Ideal for aerospace, automotive, and chemical industries

hnbr

HNBR is a hydrogenated version of NBR, offering higher strength and heat resistance.

Key Capabilities
  • Excellent mechanical strength
  • Good oil and chemical resistance
  • Improved heat and ozone resistance
Temperature Range
  • Approx. –40°C to +150°C
Can be modified by formulation?
  • Wear resistance
  • CLow-temperature performance
Special Characteristics
  • Used in high-performance sealing applications

FFKM

FFKM is an ultra-high-performance rubber for extreme chemical and temperature conditions.

Key Capabilities
  • Near-universal chemical resistance
  • Extremely high temperature resistance
Temperature Range
  • Approx. –20°C to +325°C
Can be modified by formulation?
  • Specific chemical compatibility
Special Characteristics
  • Used in semiconductor, pharmaceutical, and critical applications

SBR (Styrene Butadiene Rubber)

SBR is a versatile and cost-effective synthetic rubber widely used for general-purpose applications, offering good abrasion resistance and reliable mechanical performance.

Key Capabilities
  • Good abrasion and wear resistance
  • Reliable mechanical strength
  • Economical and easy to process
Temperature Range
  • Approx. –40°C to +100°C
Can be modified by formulation?
  • Hardness and flexibility
  • Abrasion and tear resistance
  • Aging and heat resistance
Special Characteristics
  • Widely used in tyres, rubber sheets, gaskets, and general-purpose moulded components

sri harini rubber products

ENGINEERING PLASTICS

Engineering plastics are rigid, strong, and dimensionally stable materials, used where rubber flexibility is not required.

NYLON (PA)

Key Capabilities
  • High mechanical strength
  • Excellent wear resistance
  • Low friction
Temperature Range
  • Approx. –40°C to +120°C
Special Characteristics
  • Used for bushes, spacers, and mechanical parts

TEFLON (PTFE)

Key Capabilities
  • Excellent chemical resistance
  • Very low frictione
  • Non-stick surface
Temperature Range
  • Approx. –200°C to +260°C
Special Characteristics
  • Used for bushes, spacers, and mechanical parts

PVC

Key Capabilities
  • Good chemical resistance
  • Electrical insulation
  • Cost-effective material
Temperature Range
  • Approx. –10°C to +60°C
Special Characteristics
  • Used for protective and insulation components

POLYURETHANE (PU)

Key Capabilities
  • Excellent abrasion and wear resistance
  • High load-bearing capacity
  • Good flexibility with high tear strength
Temperature Range
  • Approx. –30°C to +80°C
Special Characteristics
  • Used for rollers, wheels, seals, pads, and high-wear industrial components

Custom Compounding

How We Customize Materials

Precision-engineered rubber compounds designed to perform under demanding conditions.

Controlled Hardness

Shore A hardness precisely matched to functional requirements.

Temperature Stability

Formulations optimized for high and low temperature performance.

Chemical Resistance

Enhanced resistance to oils, fuels, and aggressive chemicals.

Extended Service Life

Compounds engineered for durability and long-term reliability.

Application-Specific Solutions

Each compound is custom-developed to meet exact application demands, compliance standards, and operating environments.

Contact Technical Team

sri harini rubber products

Rubber Comparison Chart

Performance comparison across key environmental and mechanical properties.

🟢 Excellent 🟡 Moderate 🔴 Poor ❌ Not Recommended
Material Oil
Resistance		 Weather /
UV		 Heat
Resistance		 Low Temp
Flexibility		 Abrasion /
Wear		 Chemical
Resistance
Natural Rubber (NR) 🔴 🔴 🟡 🟢 🟢 🔴
SBR 🔴 🔴 🟡 🟡 🟢 🔴
Nitrile Rubber (NBR) 🟢 🟡 🟡 🟡 🟢 🟡
EPDM 🔴 🟢 🟢 🟢 🟡 🟡
Neoprene (CR) 🟡 🟢 🟡 🟡 🟡 🟡
Silicone Rubber 🔴 🟢 🟢 🟢 🔴 🟡
Viton® / FKM 🟢 🟢 🟢 🟡 🟡 🟢
HNBR 🟢 🟢 🟢 🟢 🟢 🟡
FFKM 🟢 🟢 🟢 🟡 🟡 🟢

Temperature Range Comparison

Rubber Materials Comparison

Operating temperature ranges for common rubber materials

Material Min Temp Max Temp Operating Range
Natural Rubber (NR) –50°C +80°C
SBR –40°C +100°C
Nitrile Rubber (NBR) –30°C +120°C
EPDM –40°C +150°C
Neoprene (CR) –35°C +120°C
Silicone Rubber –60°C +230°C
Viton® / FKM –20°C +250°C
HNBR –40°C +150°C
FFKM –20°C +325°C

sri harini rubber products

Frequently Asked Questions

Find quick answers to common questions about our rubber materials, applications, and customization process.

We manufacture rubber products using Natural Rubber (NR), SBR, Nitrile Rubber (NBR), EPDM, Neoprene, Silicone Rubber, Viton® (FKM), HNBR, and FFKM. We also work with engineering plastics such as Nylon, PTFE (Teflon), and PVC.

Choosing the right rubber material depends on temperature range, operating environment, oil or chemical exposure, and mechanical requirements. Our team supports customers in selecting the most suitable rubber compound based on their application.

Nitrile Rubber (NBR), HNBR, and Viton® (FKM) are commonly used for applications involving oil, fuel, and grease resistance in automotive and industrial environments.

EPDM and Neoprene Rubber are ideal for outdoor use due to their excellent resistance to UV rays, ozone, heat, and weathering.

Silicone Rubber, Viton® (FKM), and FFKM are suitable for high-temperature applications. Silicone is commonly used for flexibility at extreme temperatures, while FKM and FFKM are preferred for chemical and oil exposure at elevated temperatures.

Yes. Rubber compounds can be customized for hardness, tensile strength, compression set, temperature resistance, oil resistance, and chemical resistance through specialized rubber formulations.

We offer rubber compounds typically ranging from 10 to 90 Shore A, depending on the material type and application requirement.

Rubber materials are flexible and elastic, suitable for sealing and vibration control, while engineering plastics like Nylon, PTFE, and PVC are rigid materials used for wear resistance, low friction, and dimensional stability.

PTFE (Teflon), Viton® (FKM), and FFKM provide excellent resistance to a wide range of chemicals, acids, and solvents.

Yes. Our rubber compounds are widely used in automotive, industrial, electrical, and general engineering applications, including seals, gaskets, bushes, and molded rubber parts.

Yes. EPDM, Silicone Rubber, and HNBR offer good flexibility and performance in low-temperature conditions, depending on compound formulation.

Yes. We supply food-grade and medical-grade silicone and rubber compounds, subject to application and compliance requirements.

Yes. We provide technical support, material selection guidance, and manufacturing feasibility assistance to ensure optimal product performance.

To provide an accurate quotation, we require drawing or sample, quantity, application details, operating temperature, and working environment.

Yes. We specialize in custom rubber compound development tailored to customer performance, durability, and environmental requirements.

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