COMPOUNDS

SRP Specialty Compounds develops elastomer materials suitable for a wide range of industrial environments. These compounds are formulated to deliver reliable performance under demanding operating conditions including high temperatures, aggressive chemicals, and mechanical stress.

The company produces compounds based on several advanced elastomer systems, including FKM, FFKM, HNBR, AFLAS, VMQ, Fluorosilicone, AEM, and ACM. These materials are widely used across industries where high chemical resistance, thermal stability, and durability are required.

SRP compounds are designed to perform within a wide operating temperature range from −60°C to +375°C, depending on the specific elastomer material and application conditions. This wide temperature capability enables the company to supply compounds suitable for applications ranging from low-temperature environments to extremely high-temperature industrial systems.

MATERIALS AND TECHNICAL RANGE

1 HNBR

HARDNESS RANGE (SHORE A): 50–95

Advantages:

  • Excellent heat and oil resistance
  • Superior ozone and weather resistance
  • Improved mechanical strength
  • Good abrasion resistance
  • Suitable for dynamic and static sealing applications

Limitations:

  • Higher cost than NBR
  • Lower flexibility than silicone at very low temperatures
  • Chemical resistance depends on formulation

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.48 ISO 2781
2 TENSILE STRENGTH MPA 7.58 ISO 37
3 ELONGATION AT BRAKE % 225 ISO 37
4 COMPRESSION SET % 22 METHOD A, ISO 815-1
5 VOLUME CHANGE (IRM 1) % -63 ISO 812
6 VOLUME CHANGE (IRM 3) % 13 ISO 1817
7 MODULUS AT 100% MPA 4 ISO 37
2 FKM (General) - Bisphenol

HARDNESS RANGE (SHORE A): 60–90

Advantages:

  • Excellent chemical resistance
  • High-temperature resistance up to 220 °C
  • Excellent oil and fuel resistance
  • Long service life
  • Requires fewer compounding chemicals

Limitations:

  • Expensive
  • Poor resistance to hot tear
  • High specific gravity
  • Requires stainless steel molds
  • Limited low-temperature flexibility

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.82 ISO 2781
2 TENSILE STRENGTH MPA 11 ISO 37
3 ELONGATION AT BRAKE % 220 ISO 37
4 COMPRESSION SET
(70 hr at 200 degree C)		 % 16 ISO 815-1
METHOD A
5 VOLUME CHANGE (IRM 1) % 1.14 ISO 1817
6 VOLUME CHANGE (OIL 3) % 3.2 ISO 1817
7 MODULUS AT 100% MPA 5 ISO 37
3 FVMQ (Fluorosilicone)

HARDNESS RANGE (SHORE A): 30–80

Advantages:

  • Excellent fuel & gasoline resistance
  • Wide temp range (–60 °C to +200 °C)
  • Great low-temp flexibility
  • Strong ozone & weather resistance
  • Good compression set resistance
  • Good mechanical properties

Limitations:

  • Expensive
  • Moderate tensile and tear strength compared to hnbr and fkm
  • Lower abrasion resistance than HNBR or FKM
  • Not suitable for strong acids and ketones
  • Not suitable for dynamic appl

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.48 ISO 2781
2 TENSILE STRENGTH MPA 7.58 ISO 37
3 ELONGATION AT BRAKE % 225 ISO 37
4 COMPRESSION SET % 22 ISO 815 -1
METHOD A
5 BRITTLE POINT % -63 ISO 812
6 VOLUME SWELL IN FUEL (B) % 13 ISO 1817
7 MODULUS AT 100% MPA 4 ISO 37
4 FKM GLT(Great Low Temperature)

HARDNESS RANGE (SHORE A): 60–90

Advantages:

  • Improved low-temperature flexibility (–35 to +225°C)
  • Excellent oil and fuel resistance
  • High-temperature stability
  • Good compression set

Limitations:

  • Improved low-temperature flexibility (–35 to +225°C)
  • Excellent oil and fuel resistance
  • High-temperature stability
  • Good compression set

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.80 ISO 2781
2 TENSILE STRENGTH MPA 10.3 ISO 37
3 ELONGATION AT BRAKE % 250 ISO 37
4 COMPRESSION SET % 19 ISO 815-1
METHOD A
5 VOLUME CHANGE (OIL 1) % 1.16 ISO 1817
6 VOLUME CHANGE (OIL 3) % 3.5 ISO 1817
7 MODULUS AT 100% MPA 3.6 ISO 37
5 FKM VPL (Very Low Temperature)

HARDNESS RANGE (SHORE A): 60–90

Advantages:

  • Excellent resistance to oils, fuels, and hydrocarbons
  • Enhanced resistance to aggressive chemicals
  • Temperature range (-40 to 220 °C)
  • Good compression set
  • Suitable for low temperature applications

Limitations:

  • Expensive
  • Higher specific gravity
  • Limited resistance to strong polar solvents
  • Limited raw material source

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.83 ISO 2781
2 TENSILE STRENGTH MPA 13 ISO 37
3 ELONGATION AT BRAKE % 220 ISO 37
4 COMPRESSION SET % 11 ISO 815-1
METHOD A
5 VOLUME CHANGE (OIL 1) % 6 ISO 1817
6 VOLUME CHANGE (OIL 3) % 9 ISO 1817
7 MODULUS AT 100% MPA 6.9 ISO 37
6 FEPM AFLAS

HARDNESS RANGE (SHORE A): 60–95

Advantages:

  • Excellent resistance to amines and alkaline chemicals
  • Very good steam and hot water resistance
  • Temperature range (-3 to 220 °C)
  • Good oil resistance
  • Excellent aging resistance

Limitations:

  • Limited low temperature flexibility
  • Expensive
  • Limited raw material source

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.6 ISO 2781
2 TENSILE STRENGTH MPA 18 ISO 37
3 ELONGATION AT BRAKE % 220 ISO 37
4 COMPRESSION SET % 14 ISO 815-1
METHOD A
5 VOLUME CHANGE
(STEAM RESISTANT)		 % 2 ISO 1817
6 VOLUME CHANGE (OIL 3) % 11.8 ISO 1817
7 MODULUS AT 100% MPA 6 ISO 37
7 FFKM – Perfluoroelastomer

HARDNESS RANGE (SHORE A): 60–95

Advantages:

  • Near-universal chemical resistance
  • Temperature range(0 to 375 °C continuous)
  • Excellent compression set at elevated temperatures
  • Very low contamination and outgassing
  • Suitable for ultra-severe chemical and high-temperature environments
  • Suitable for extreme high temperature application.

Limitations:

  • Extremely expensive (5 to 6 lakhs per kgs)
  • Not suitable for low Temperature application
  • Moderate mechanical strength compared to specialty elastomers
  • Requires controlled processing and postcuring

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 2.05 ISO 2781
2 TENSILE STRENGTH MPA 17 ISO 37
3 ELONGATION AT BRAKE % 200 ISO 37
4 COMPRESSION SET
(O-RING)		 % 23 ISO 815-1
METHOD A
5 FUEL B CHANGE IN VOLUME % 0.2 ISO 1817
6 HYDRAULIC FLUID RESISTENCE % 4.6 ISO 1817
7 MODULUS AT 100% MPA 6.9 ISO 37
8 FKM ETP – Enhanced Performance Fluorocarbon

HARDNESS RANGE (SHORE A): 60–95

Advantages:

  • Excellent resistance to oils, fuels, and aggressive chemicals
  • High-temperature resistance up to 220 °C
  • Very good compression set and aging resistance
  • Suitable for severe industrial and automotive applications

Limitations:

  •  Higher material cost
  • Limited low-temperature flexibility (approx. –15 °C)
  • Not suitable for strong polar solvents

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.82 ISO 2781
2 TENSILE STRENGTH MPA 18 ISO 37
3 ELONGATION AT BRAKE % 220 ISO 37
4 COMPRESSION SET
(70 hr at 200 °C) 		% 51 ISO 815-1
METHOD A
5 SOLVENT RESISTENT - MEK % 21 ISO 1817
6 POTASSIUM HYDROXIDE IN WATER % 2 ISO 1817
7 MODULUS AT 100% MPA 7 ISO 37
9 FKM Peroxide Cure

HARDNESS RANGE (SHORE A): 60–90

Advantages:

  • Improved steam and hot water resistance
  • Enhanced chemical resistance
  • Temperature range(-17 to 220 °C continuous)
  • Good compression set resistance
  • Suitable for oil & gas applications

Limitations:

  • Expensive
  • Limited low temperature flexibility
  • Requires controlled processing
  • Poor resistance to strong polar solvents

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.83 ISO 2781
2 TENSILE STRENGTH MPA 23.4 ISO 37
3 ELONGATION AT BRAKE % 320 ISO 37
4 COMPRESSION SET % 15 ISO 815-1
METHOD A
5 FUEL B % 2 ISO 1817
6 VOLUME CHANGE (OIL 3) % 0.5 ISO 1817
7 MODULUS AT 100% MPA 4.93 ISO 37
10 ACM (Poly Acrylic)

HARDNESS RANGE (SHORE A): 50–90

Advantages:

  • Excellent resistance to hot oils & ATF
  • Very good heat resistance (up to 175 °C)
  • Good ozone & weather resistance
  • Good aging resistance
  • Good high-temp compression set resistance

Limitations:

  • Poor low-temperature flexibility
  • Not suitable for fuel applications
  • Moderate mechanical strength
  • Higher cost than NBR

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.33 ISO 2781
2 TENSILE STRENGTH MPA 12 ISO 37
3 ELONGATION AT BRAKE % 210 ISO 37
4 COMPRESSION SET % 12 ISO 815-1
METHOD A
5 VOLUME CHANGE (IRM 1) % -2.9 ISO 1817
6 VOLUME CHANGE (OIL 3) % 10.1 ISO 1817
7 MODULUS AT 100% MPA 6 ISO 37
11 AEM (Vamac)

HARDNESS RANGE (SHORE A): 50–90

Advantages:

  • Excellent heat resistance (up to 150 °C continuous)
  • Very good oil resistance
  • Good low-temperature flexibility (–40 °C)
  • Excellent ozone and weather resistance
  • Low compression set

Limitations:

  • Poor resistance to fuels and aromatic hydrocarbons
  • Limited resistance to polar solvents
  • Higher cost than NBR and EPDM

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.24 ISO 2781
2 TENSILE STRENGTH MPA 18 ISO 37
3 ELONGATION AT BRAKE % 250 ISO 37
4 COMPRESSION SET % 24 ISO 815-1
METHOD A
5 VOLUME CHANGE (OIL 1) % 6 ISO 1817
6 VOLUME CHANGE (OIL 3) % 26 ISO 1817
7 MODULUS AT 100% MPA 3.3 ISO 37
12 ECO (Epichlorohydrin)

HARDNESS RANGE (SHORE A): 50–90

Advantages:

  • Excellent fuel, oil & hydrocarbon resistance
  • Good heat resistance (~150 °C continuous)
  • Excellent ozone & weather resistance
  • Low gas permeability
  • Good aliphatic hydrocarbon resistance
  • Good aging stability

Limitations:

  • Poor low-temperature flexibility (generally limited below –30 °C)
  • Moderate mechanical strength compared to HNBR
  • Limited resistance to aromatic solvents and strong chemicals
  • Processing requires careful control

MATERIAL TEST REPORT:

SL NO PROPERTY UNIT ACTUAL VALUE TEST STANDARD
1 SPECIFIC GRAVITY - 1.25 ISO 2781
2 TENSILE STRENGTH MPA 13 ISO 37
3 ELONGATION AT BRAKE % 400 ISO 37
4 COMPRESSION SET % 25 ISO 815-1
METHOD A
5 VOLUME CHANGE (OIL 1) % -6 ISO 1817
6 VOLUME CHANGE (OIL 3) % -2 ISO 1817
7 MODULUS AT 100% MPA 6 ISO 37

High-Performance Elastomer Compounds for Critical Applications

Advanced materials, precise compounding, and reliable supply for demanding industries.

Contact Us