Westar® Stoppers

Flexible solutions for pharmaceutical components

Westar® Ready-to-Use (RU) or Ready-to-Sterilize (RS) stoppers can help streamline preparation and deliver a consistent product for use in fill-finish operations.
Westar RS LogoWestar RU Logo


West's validated wash process, Westar RS, is used to produce components that are ready for gamma or steam sterilization. Westar RS stoppers are available in a range of formulations, designs, and packaging options to help transition resource-intensive, non-core component preparation activities to an expert external partner.


West's validated steam sterilization process, Westar RU, is applied after the Westar RS wash process to produce components for direct introduction into filling operations. Westar RU components help manage regulatory and compliance risk, facilitate equipment and space management, and reduce ongoing validation activities.

The Westar RU and RS processes are supported by a DMF.

 Westar Stoppers Product Attributes

Packaging Options include sterilizable bags and different ported bag types.

Unique Designs to Meet Your Specific Applications

Every day, West is working by our partners’ side to design and manufacture drug packaging and delivery systems that will bring their drugs from concept to patient efficiently, reliably and safely. West's concept design, development, engineering and project management teams can facilitate all steps necessary to take a product from concept to commercialization, including full validation and chemical and functional testing. Custom components can be provided in ready-to-use or ready-to-sterilize formats.

Click here for a real world example of a custom development project between West and a customer.


 Westar® FluroTec® and West Ready Pack®  are registered trademarks of West Pharmaceutical Services, Inc. in the United States and other jurisdictions.

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