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Hydrin® ECO

Hydrin® epichlorohydrin (ECO) elastomers provide an excellent balance of heat (125°C), oil, fuel, and ozone resistance with superior low temperature flexibility. Hydrin is broadly used in automotive fuel hose, air ducts, A/C, and vibration dampening. Its electrical properties benefit laser printer rolls.

Hydrin is classified as a CH polymer according to SAE J200 / ASTM D2000.

photo of Hydrin epichlorohydrin (ECO) elastomers

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Low Temperature Fuel Resistance

Hydrin ECO offers a unique combination of fuel resistance and low-temperature flexibility. As illustrated, compared to other elastomers of similar cost level, Hydrin has the best resistance to Fuel C while still possessing a glass transition temperature of -41°C.

Exceptional Heat Resistance

Standard Hydrin withstands prolonged heat exposure to 125°C. Tensile strength is maintained after 1008 hours, 125°C exposure and hardness is minimally changed. Hydrin DP5227 is suggested for applications needing prolonged heat exposure up to 160°C short term.Chart showing Hydrin's tensile strength retention to 125 degrees Celsius

Static Dissipative

Hydrin is inherently and permanently static dissipative. Its polyether backbone provides conductivity, making it one of the most dissipative polymers available. These electrical properties remain uniform across molded articles. Hydrin can be compounded to achieve resistivity values as low as 3 x 105 ohms without the addition of conductive additives.

Superior Fuel Resistance vs. CSM

Hydrin is an excellent alternative for chloro-sulfonated polyethylene (CSM) and polychloroprene (CR) rubber.

Hydrin’s resistance to diesel and bio-diesel fuels is superior to that of CSM. Compared to Hydrin, CSM suffers from loss of tensile strength and high level of volume change. As shown in the second table, heat resistance is similar to CR rubber.

Chart showing Hydrin's superior tensile resistance compared to CSMChart showing Hydrin's similar heat resistance to CR rubber

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Automotive Air Ducts & Hoses

photo of Automotive Air Duct hose made with synthetic elastomers

Hydrin’s excellent resistance to hydrocarbon fluids and fuels make it ideal for air intake systems incorporating exhaust gas recirculation or engines with moderate to high levels of blow-by products. Automotive clean air intake ducts benefit from Hydrin due to its desirable balance of performance at a broad range of temperatures from -40°C to +135°C. 

Chart showing Hydrin's broad serviceable temperature range

Suggested Grades

Product GradeMooney ViscositySpecific GravityTg, (°C)

Fuel Hoses and Diaphragms

photo of Fuel Hose made with synthetic elastomer

Hydrin enables lower cost fuel hoses compared to other constructions.

Mono- and multi-layer fuel hoses are common applications of Hydrin. In multi-layer hoses, bis-phenol cured Hydrin provides excellent adhesion to the FKM inner layer and reinforcing braid while the terpolymer series of Hydrin is utilized for the cover layer. A common multi-layer construction is: Inner [bis-phenol cured FKM] | Tie Layer [Hydrin C2000 copolymer + Braid] | Cover layer [Hydrin T3105 terpolymer].

Bonding agents are commercially available, such as Hydrin PX or Dynamar, specially designed to promote ECO adhesion to peroxide cured and bisphenol cured FKM.

Suggested Grades

Product GradeMooney ViscositySpecific GravityTg, (°C)

Laser Printer Rollers

photo of Laser Printer Rollers made with synthetic elastomersThe inherently static dissipative properties of Hydrin make it useful for both charge and developer rolls in laser printers and paper copier machines. The electrical resistance is consistent along the length of rolls made with Hydrin, which enables reliable, long-life print quality. While other elastomers require conductive additives, which may leach out and degrade over time, Hydrin is inherently static dissipative.

*Vulcanized 20min/170°C, 4hr/150°C Post Cure

Attribute*Hydrin T3106 GumstockHydrin T3108 GumstockHydrin T3108XL Gumstock
Hardness, Shore A434230
Resilience, Rebound, (%)555652
Compression Set,22H/70°C4.8%5.8%5.5%
Volume Resistivity, NN, +100V, ohm6.2E+053.2E+052.9E+05
Log Ohms5.85.55.5

Suggested Grades

Product GradeMooney ViscositySpecific GravityTg, (°C)


Polychloroprene Rubber (CR) Replacement

Polychloroprene rubber (CR) can be replaced with Hydrin in a multitude of applications including seals and air springs. Hydrin fully meets ASTM D2000/SAE J200 ‘BC’ and ‘BE’ requirements.

AttributeTypical Hydrin CompoundRange (Compound)
Shore A Hardness, points7040 to 90
Tensile @ Break, MPa108 to 18
Elongation @ Break, %250150 to 600
Compression Set, % (22 hours @ 100°C)1510 to 25
Heat Resistance, Tensile & Elongation, % Δ (70 hours @ 125°C)-40-30 to -60 °C
IRM901 Oil, % Δ Volume (70 hours @ 125°C)1-5 to +5
IRM903 Oil, % Δ Volume (70 hours @ 125°C)100 to +12
Fuel B Resistance, % Δ Volume (48 hours @ 23°C)15+5 to +25
Fuel C Resistance, % Δ Volume (48 hours @ 23°C)35+20 to +45
Low-Temperature Flexibility, °C-40Down to -55


Hydrin® Epichlorohydrin Elastomers (ECO)

Product GradeMooney
Special Properties / Applications
H4540-501.37-21Highest Chlorine content for heat and chemical resistance, outstanding permeation resistance to gases, and high damping. Lowest Mooney version for injection molding.
H5550-601.37-21Outstanding permeation Highest Chlorine content for heat and chemical resistance, outstanding permeation resistance to gases, and high damping. Medium Mooney version for general purpose.
H6560-701.37-21Highest Chlorine content for heat and chemical resistance, outstanding permeation resistance to gases, and high damping. High Mooney version for higher filler levels.
H110052-651.35-26Outstanding permeation resistance to helium, hydrogen, nitrogen, air, and carbon dioxide.
Can be sulfur or peroxide cured.
DP5245TBD1.32-16Newly developed ultra-high damping grade with good heat and oil resistance. Designed for vibration isolation and acoustic damping.
C200090-1021.28-41Fuel pump diaphragms, hose, coated fabrics and vibration mounts. Can also impart antistatic properties to plastics.
C2000M75-901.28-41Medium viscosity version of C2000.
C2000L65-751.28-41Low viscosity version of Hydrin C2000.
C2000LL53-651.28-41Lower viscosity version of Hydrin C2000.
C2000XL40-521.28-41Lowest viscosity version of Hydrin C2000 for optimal injection flow.
DP5227TBD1.25-36Newly developed heat resistant grade with extremely easy processing. Higher heat and oil resistance over standard ECO up to 160C short term.
T300080-941.28-43Terpolymer of ECH/EO/AGE. Sulfur-curable, and can be blended with other elastomers.
T3000L65-791.28-43Low viscosity Hydrin T3000.
T3000LL50-641.28-43Lowest viscosity version of Hydrin T3000 for optimal injection flow.
T310063-771.31-36Highest AGE content terpolymer for enhanced cure state and ozone resistance.
T310280-1001.31-38Highest ECH content terpolymer for improved heat and ozone resistance.
T310570-801.29-41High ECH and AGE content terpolymer for improved ozone resistance.
T310653-671.26-48Higher EO content polymer giving enhanced electrostatic dissipative properties. Designed for laser printer rolls.
T310840-541.23-48Highest EO content polymer, giving even lower volume resistivity. Intended for electrostatic dissipative applications.
T3108XL10-251.22-48Improved processing and low hardness version of T3108. Lowest hardness, electrical resistivity, and specific gravity of any Hydrin product. Designed for laser printer rolls.
T501075-1001.27-40Good general purpose terpolymer with easy processing. Can be sulfur or peroxide cured.
DP525035-451.25-40Next generation HT-ECO. Sulfur or peroxide curable. Highest heat resistance up to 135-150C long-term plus improved processability for easy mill-release, fast extrusion, and calendaring.

Contact a ZEON technical specialist for more grades or to discuss a specific application, specification, question or request a sample.
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