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Published on June 1, 2005

Santoprene™ TPV Corner Molding for EPDM Weatherseal: New Approach for Optimum Adhesion Performance

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Date Published June 1, 2005

Weatherseals are among the primary elements for the insulation of the automotive passenger compartment from noise, water and dust. These profiles are generally complex parts integrating aerodynamic and aesthetic requirements. They generally use selected sets of raw materials to fulfill all the requirements. The most important raw material is EPDM rubber, which imparts to the weatherseal its elastic and sealing attributes. These are not just simple extruded profiles but require a number of finishing operations, in particular the addition of moldings to provide full functionality to the seal. Figure 1 below illustrates (a) end caps for draining water and (b) connectors between two belt line seals, including the outside mirror seal. Another example would be a corner molding joining two parts of a glass run channel.