DuPont™ Hytrel® TPC-ET in CVJ Boots - 25 Trouble-Free Years

DuPont™ Hytrel® TPC/ET boasts 25 trouble-free years

Application Description

Among the great unsung heroes in a vehicle – the Constant Velocity Joint (CVJ) boot.  Emphasis on “constant,” this component faces an average of 150,000 miles of pounding, pelting and thermal cycling.

Enter DuPont™ Hytrel® thermoplastic elastomer.  Now in its 25th year and celebrating no material failures on the road, Hytrel® delivers the flexibility of rubber, the strength of plastic, and the processibility of thermoplastic.

Hytrel® is the industry standard for excellent balance of grease resistance, high temperature durability, low temperature flexibility and historically proven performance. Hytrel® is proven for use in inboard and outboard CVJ (constant velocity joints) boots, prop shaft boots and rear-wheel-drive boots.

With new product grades optimized for higher temperature resistance, better abrasion resistance and flex fatigue, Hytrel® continues to deliver trouble-free performance despite extreme thermal cycling and exposure to chemicals like road salt.

Benefits to Customer / End User

Compared with rubber, Hytrel® invites thinner design for better packaging in tight spaces, vastly improves performance and durability for greater service life.

Compared with co-polyesters, Hytrel® delivers the optimal combination of flexibility and stiffness, protecting against expensive repairs.

Excellent fatigue resistance and design flexibility of Hytrel® allows CVJ boots to be designed in smaller sizes than rubber boots, which reduces amount of greases and total cost of the CVJ system.

Hytrel® is the preferred material because it is thinner and more durable than many rubber materials, and it has a more optimal combination of flexibility and stiffness than co-polyesters. In addition, the fatigue resistance and design flexibility of Hytrel® allows CVJ boots to be designed in smaller sizes, reducing the amount of greases and the total cost of the CVJ system.


Hytrel® blow-molding grades can be processed on press-blow, extrusion-blow and injection-blow molding equipment.  Hytrel® blow-molding resins can be processed on extrusion-blow, injection-blow and Ossberger press-blow machines.