With over 15 years of manufacturing excellence, Yonghaiseals specializes in custom EPDM, silicone, and sponge rubber extrusions.

We deliver high-performance sealing, waterproofing, and weatherstripping solutions for RVs, doors & windows, electrical enclosures, curtain walls, energy storage cabinets, and shipping containers. From custom profile design and rapid prototyping to mass production, we provide precision-engineered rubber seals that meet rigorous global standards.

• • Fast Customization & Prototyping

    • Custom die extrusion and quick sample delivery within [5-7] days.

  • Industrial-Grade Performance

  • Superior UV, ozone, weather, and temperature resistance for long service life.

  • Precision Extrusion Capability

  • Advanced co-extrusion with steel core, sponge/solid composite sealing.

  • Global Supply & Support

  • Serving OEM & B2B partners worldwide with full-process tracking and quick-response service.