Turel® & Isolast®

Turel® & Isolast®

The Turel® range of elastomers is specifically engineered to meet the challenging requirements of the aerospace industry. It includes Nitrile (NBR), Fluorocarbon (FKM), Ethylene Propylene Diene Monomer (EPDM), Hydrogenated Nitrile Butadiene Rubber (HNBR), Fluorosilicone (FVMQ) and Silicone Rubber (Q).

In addition for high-temperature applications, an Isolast® perfluoroelastomer (FFKM) is recommended. These materials are extremely flexible in their use and are suitable for a large number of applications.

NBR (Nitrile Butadiene Rubber)
Turel® Standard Grades: NE, NG, NB, NZ
NBR is primarily used with mineral-based oils and greases. The properties of NBR depend mainly on their acrylonitrile (CAN) content, which ranges between 18 and 50 percent. In general the materials have good mechanical properties with operating temperatures ranging between -30°C / -22°F and +100°C / +212°F. For short periods of time NBRs can withstand up to +120°C / +248°F and specially formulated NBR can be used down to -60°C / -76°F

FKM (Fluorocarbon Rubber)
Turel® Standard Grades: FK, FT, FG, FL
FKM is primarily used with mineral-based oils and greases at high temperatures. Depending on structure and fluorine content, FKM materials can differ with regards to their chemical resistance and cold-flexibility. FKM is particularly known for its non-flammability, low gas permeability, and excellent resistance to ozone, weathering, and aging. The operating temperatures of FKM materials range between -20°C / -4°F and +200°C / +392°F. For short periods of time FKMs can withstand up to +230°C / +446°F and specially formulated FKM can be used down to -35°C / -31°F.

EPDM (Ethylene Propylene Diene Monomer)
Turel® Standard Grades: EP, EH
EPDM is often used in applications with brake fluids, based on glycol, and hot water. EPDM materials give good heat, ozone, and aging resistance. In addition they also exhibit high levels of elasticity, good low temperature behavior as well as good insulating properties.

The operating temperatures of EPDM materials range between -45°C / -49°F and +150°C / +302°F. For short periods of time they can withstand up to +347°F/+175°C. Operating temperatures of sulfur cured types are reduced to between -45°C / -49°F and +120°C / +248°F, for short periods of time EPDMs can withstand up to +150°C / +302°F.

HNBR (Hydrogenated Nitrile Butadiene Rubber)
HNBR is often used in high-temperature applications due to excellent abrasion resistance. HNBR materials are produced by selective hydrogenation of the NBR groups. Like these, the properties of the HNBR rubber depend on their acrylonitrile (ACN) content which ranges between 18 and 50 percent as well as on the degree of its saturation. HNBR has good mechanical properties.

The operating temperatures of HNBR materials range between -30°C / -22°F and +140°C / +284°F. For short periods of time HNBRs can withstand up to +160°C / +320°F in contact with mineral oils and greases. Special formulations can be used down to -40°C / -40°F.

FVMQ (Fluorosilicone Rubber)
Turel® Standard Grades: LA, LB, LD, LF
FVMQ is often used in the military applications and fuel systems. FVMQ materials give excellent heat resistance, cold flexibility, dielectric properties and especially good resistance to oxygen and ozone.

Depending on the material, operating temperatures range between -60°C / -76°F and +200°C / +392°F. For short periods of time FVMQs can withstand up to +230°C / +446°F. Special formulations can be used down to -90°C / -130°F.

Q (Silicone Rubber)
Turel® Standard Grades: SL
Silicone rubber is often used in gaskets, molded seals, airframe, aerodynamic and engine seals. The material gives excellent heat resistance, cold flexibility, dielectric properties and especially good resistance to oxygen and ozone.

Depending on the material, operating temperatures range between -60°C / -76°F and +200°C / +392°F. For short periods of time Silicone Rubbers can withstand up to +230°C / +446°F. Special types can be used down to -90°C / -130°F.

FFKM (Perfluoroelastomer)
Isolast® Standard Grades: J8325
Applications for FFKM can be mostly found in aircraft engines and in all applications with either aggressive environments or high temperatures.

Perfluoroelastomers are resistant to virtually all media at elevated temperatures and demonstrate low swelling.

To select the optimum material for your application use our online tools:

  • Material search allows you to identify compounds that meet specific property requirements and those that comply to specific approvals or standards.
  • Chemical compatibility check allows you to find the level of resistance of material groups to a broad range of media, both fluids or gases including those used within semiconductor manufacturing.