EPDM D-Section Weather Seal

The closed-cell structure of EPDM sponge profiles limits the ingress of water vapor, air, and particulates. Water absorption rates typically remain below 5% by volume, depending on the density and structure. This is critical in maintaining internal humidity control within electrical cabinets, control panels, and sealed mechanical assemblies. This feature mitigates corrosion risk in metallic housings and prevents pressure equalization failures in sensitive enclosures. 

EPDM elastomers possess inherently high volume resistivity (typically >10¹⁴ Ω·cm), making the material ideal for applications that require dielectric isolation between conductive surfaces. The non-conductive nature of EPDM prevents current leakage paths and provides insulation barriers in electrical cabinets, battery housings, and high-voltage assemblies. Its low dielectric constant contributes to reduced capacitive coupling, critical in EMI-sensitive environments.