Medical stoppers

Medical stoppers are installed on IV bags and resealable pharmaceutical bottles to allow needle access to fluid or medication without residual leakage. Stopper materials should have good coring resistance, such as accommodate needle insertion without generating  rubber material fragments that can contaminate medications.  It must also be resealable, have low levels of extractable impurities and be inert towards sensitive drugs.

Natural rubber has not been used in this application for several years, partly because of potential Type 1 allergic reactions in patients sensitive to its naturally occurring proteins.  Cariflex polyisoprene products are protein-free and provide the coring resistance and resealability needed for effective medical stopper applications. These high-purity polymers also reduce the possibility of drug contamination from the stopper even after aging.

Features and benefits

  • Resealable
  • Coring resistance
  • High purity
  • Inert towards sensitive drugs
  • Low levels of extractable impurities
  • Reduce risk of drug contamination
  • Eliminate Type I allergy


Contact us


Medical Disclaimer

Kraton Corporation and all of its affiliates, including Kraton Chemical, believe the information set forth herein to be true and accurate, but any recommendations, presentations, statements or suggestions that may be made are without any warranty or guarantee whatsoever, and shall establish no legal duty on the part of any Kraton affiliated entity.  The legal responsibilities of any Kraton affiliate with respect to the products described herein are limited to those set forth in Kraton’s Conditions of Sale or any effective sales contract.  NOTE TO USER: by ordering/receiving Kraton product you accept the Kraton Conditions of Sale applicable in the region.  All other terms are rejected.  Kraton does not warrant that the products described herein are suitable for any particular uses, including, without limitation, cosmetics and/or medical uses.  Persons using the products must rely on their own independent technical and legal judgment, and must conduct their own studies, registrations, and other related activities, to establish the safety and efficacy of their end products incorporating any Kraton products for any application.  Nothing set forth herein shall be construed as a recommendation to use any Kraton product in any specific application or in conflict with any existing patent rights. Kraton reserves the right to withdraw any product from commercial availability and to make any changes to any existing commercial or developmental product. Kraton expressly disclaims, on behalf of all Kraton affiliates, any and all liability for any damages or injuries arising out of any activities relating to the use of any information set forth in this publication, or the use of any Kraton products.

*KRATON, CARIFLEX and the Kraton logo are either trademarks or registered trademarks of Kraton Corporation, or its subsidiaries or affiliates, in one or more, but not all countries.

©2017 - 2018 Kraton Corporation.