Pharmaceutical rubber stopper medical silicone plugs

A pharmaceutical rubber stopper is a custom closure component that must be matched to the intended container and use conditions. Its body, seating surface, and exposed head should follow the container opening and the selected retention arrangement. Material selection is part of the complete container-closure development.

The stopper should reach its intended seat without excessive distortion or a folded edge. Review the fit with the actual container finish and any adjoining closure hardware. The component must remain correctly positioned during the handling and processing defined for the finished product. A similar nominal diameter does not establish interchangeability between different closure profiles.

The selected compound requires assessment for contact with the intended contents, the contact duration, and any cleaning or processing applied. The complete packaging system needs to establish suitability for its pharmaceutical use. A general rubber or silicone description does not by itself establish sterility, chemical compatibility, or a universal processing method.

Protect the contact surfaces from contamination and damage throughout assembly. Inspect the seating area and thin transitions before fitting, using the handling method established for the finished system. Replacement or reuse should follow that system's defined process rather than assume that an intact-looking stopper remains suitable for another application.

Material options

Custom silicone or rubber formulation; select the compound alongside the mating geometry.

Hardness selection

Silicone: 20–80 Shore A; solid rubber: 30–90 Shore A. Its body, seating surface, and exposed head should follow the container opening and the selected retention arrangement.

Custom geometry

Material selection is part of the complete container-closure development.

Fit evaluation

Inspect the seating area and thin transitions before fitting, using the handling method established for the finished system.

Color & OEM

Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. The stopper should reach its intended seat without excessive distortion or a folded edge. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.