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Weatherseals  

Bumper to bumper, ExxonMobil Chemical’s technology leadership in specialty elastomers is helping the automotive industry worldwide advance the performance and aesthetic capabilities of automotive weathersealing systems.

Applications and benefits

Improve surface appearance of encapsulated quarterlight seals with Santoprene™ TPVs, which offer:

  • Durable sealing performance
  • Functional integration and weight reduction
  • Cost-effective thermoplastic processing compared to EPDM
  • Good matte surface (color match to GRC/BLS)
  • Excellent UV and aging resistance

Recommended products:

Enhance long-term performance of inner and outer belt line seals with Santoprene TPVs, which offer:

  • Durable sealing performance
  • Cost reduction compared to EPDM (PP combination)
  • Weight reduction by replacing metal
  • Excellent UV (outer belt line) and aging resistance

Recommended products:

Improve long-term performance of glass run channels with Santoprene TPVs, which offer:

  • Part cost reduction compared to EPDM
  • Good surface appearance
  • Smooth/rubbery surface – no blooming
  • Excellent UV and aging resistance

Recommended products:

Our suite of Vistalon™ ethylene propylene diene (EPDM) rubber products meets strict OEM requirements for primary and secondary door seals, trunk and tailgate seals, and other automotive sponge weatherseal applications.

Recommended products:

Vistalon ethylene propylene diene (EPDM) rubber grades meet strict OEM requirements for glass run channels and other dense weatherseal applications. Vistalon EPDM rubber grades offer high throughput, excellent elasticity, outstanding aesthetics and high processing consistency for the most complex geometries.

For a dense weatherseal design that combines the benefits of thermoset rubber with the ease of thermoplastic processing, consider Santoprene thermoplastic vulcanizates (TPV).

Recommended products:

Santoprene TPVs for corner molding seals and end caps offer:

  • Durable sealing performance
  • Part cost reduction compared to EPDM (no rework, short cycle time)
  • Adhesion to EPDM
  • Good surface appearance
  • Smooth/rubbery surface (no blooming)
  • Excellent UV and aging resistance

Recommended products:

Make cowl seals lighter weight and more cost-effective with insert-molded and extruded cowl seal assemblies made with Santoprene TPVs, which offer:

  • Durable sealing performance
  • Cost effectiveness through function integration
  • Weight reduction
  • Excellent UV and aging resistance

Recommended products:

Improve cost effectiveness of cutline seals with Santoprene TPVs, which offer:

  • Good sealing performance
  • Cost effectiveness through function integration
  • Easy processing and broad process window
  • Excellent UV and aging properties

Recommended products:

Santoprene TPVs are designed for gap filler applications requiring scratch resistance and good appearance. Key benefits include:

  • Cost effectiveness through function integration
  • Durable sealing performance
  • Excellent UV and aging resistance
  • Good adhesion to PP

Recommended products:

Improve long-term performance of molded and extruded sunroof seals with Santoprene TPVs, which offer:

  • UV resistance
  • Durability and wear resistance with coextruded slipcoat
  • Long-term sealing performance
  • Recyclability vs. EPDM
  • Co-extrusion with hard TPV or PP
  • Foam capability for bulb designs
  • Good flowability and aesthetic appearance for molded applications
  • Cost savings compared to polyurethane RIM approaches

Recommended products:

As a cost-effective alternative to EPDM, choose Santoprene TPVs for extruded windshield, roofline and rocker seals, which offer:

  • Cost-effective alternative to EPDM
  • Co-extrustion or tri-extrusion with plastics or hard TPV grades
  • Excellent UV stability
  • Lower coefficient of linear thermal expansion (CLTE) than with PVC
  • Weight savings compared with EPDM or PVC
  • Smooth surface with no blooming compared with some EPDM
  • High-temperature compression set
  • Ease of processing

Recommended products:

Improve long-term performance of coextruded bulb seals (trunk, tailgate, hood-to-cowl and hood-to-radiator) with Santoprene TPVs, which offer:

  • Long-term sealing performance
  • Recyclability vs. EPDM
  • Coextrusion with other TPVs, TPOs or PP for dense foot
  • Weight reduction via metal replacement
  • Foam capability for low-compression load deflection

Recommended products:

Reduce weight and increase recyclability of lower sash seals with Santoprene TPVs, which offer:

  • Weight reduction and recyclability vs. EPDM
  • Coextrusion with a TPV slip layer for durability and to eliminate spray coating
  • Ease of processing
  • Long-term sealing performance
  • Coextrusion directly onto metal with a TPV tie layer

Recommended products:

Product solutions

  • ExxonMobil Chemical EDPM rubber production from Al-Jubail Chemical Complex

    EPDM rubber

    Vistalon™ ethylene propylene diene (EPDM) rubber is used in a wide variety of applications, offering processing and finished product performance beyond the capabilities of natural and general-purpose synthetic rubbers.

    Learn more
  • Composite of car, race car and kitchen on black background

    TPV

    Santoprene™ thermoplastic vulcanizates (TPV) are dependable polymers for flexible engineered parts that require long-term performance.

    Learn more

Featured resources

View highlighted news, events, technical papers and case studies below. To see our full collection of resources, browse our Library.
  • ExxonMobil Chemical Library icon

    Santoprene™ TPV vs. EPDM – Value in use for glass run channel applications

    Santoprene TPV can help you reduce your investment and space with 70% and your energy cost with 50% in glass run channel applications.

    Read more
  • ExxonMobil Chemical play button icon

    Robotic extrusion with Santoprene™ TPV

    Learn about the advantages of robotic extrusion with Santoprene™ TPV for complex automotive weatherseals.

    Watch the video
  • ExxonMobil Chemical Library icon

    Case study: Reducing the weight of automotive weatherseals for Henniges Automotive

    Case story featuring Santoprene™ TPV for automotive Glass Run Channel, Belt Line Seals and Glass Encapsulation seals produced by Henniges for the Skoda Fabia model.

    Read more
  • ExxonMobil Chemical Library icon

    Processing guidelines for the extrusion of Santoprene™ thermoplastic vulcanizates

    Observations and basic conditions for the extrusion of Santoprene thermoplastic vulcanizate (TPV) based on years of experience with processors.

    Read more
  • ExxonMobil Chemical play button icon

    The many shapes of Santoprene TPV

    Santoprene TPV is all around you. Check out just some of its uses in everyday life.

    Watch the video
  • ExxonMobil Chemical Library icon

    Weatherseals EPDM formulations

    A wide variety of formulations for the manufacturing of dense/sponge seals and corner moldings. These include one- and two-pass sponge formulations for high-performance sponge door seals and various hardness dense formulations meeting OEM requirements.

    Learn more
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