Advanced multi-material extrusion technology combining rigid PVC structural cores with flexible rubber sealing zones — delivering performance impossible with single-material profiles.
Co-extrusion is a process where two different materials are extruded simultaneously through a single die, creating a single profile with distinct zones of different hardness and flexibility. The result: one component that does the job of two, bonded permanently at the molecular level.
At Shine Masters, we co-extrude rigid PVC structural cores with flexible EPDM, TPE, or TPV sealing zones. This is increasingly specified for bus door seals, automotive glass runs, and container door profiles — where a traditional two-part assembly would require separate production, inventory, and assembly steps.
The performance advantage is significant: co-extruded profiles maintain consistent geometry under compression, resist delamination, and reduce overall system cost. We offer full custom tooling for new profile geometries.
Where Co-Extrusion Profiles Excel
Single co-ex profile replaces separate PVC frame and rubber seal in bus door systems.
Glass run channels with integrated rubber seal for smooth window operation.
Dual-function structural and sealing profile for ISO container door systems.
Co-ex seals for cold chain door systems requiring thermal and compression performance.
Panel edge profiles with integrated gasket for switchgear and control panel enclosures.
Approved composite profiles for passenger rail coach glazing and door sealing.
Key Features
PVC and rubber extruded simultaneously — no secondary bonding, no delamination risk.
Shore hardness maintained independently across rigid and flexible zones.
One component replaces two — reducing inventory, assembly time, and cost.
Full die design and manufacturing capability for new profile geometries.
EPDM, TPE, TPV, and foam core options for different performance requirements.
From drawing to approved sample — full development partnership.
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