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ASTM D4329 UV exposure of plastics is now offered at Micom Laboratories

Micom Laboratories is proud to announce that it now offers the ASTM D4329 as part of its offering for UV testing services. ASTM D4329 is aimed at three large applications: general use, automotive and polymer building products. Since it is based on practice ASTM G154, this test method is employed for performing accelerated aging on polymers to assess their capacity to uphold their mechanical properties. These include: flexibility, tensile and elongation along with other properties.

While testing to this test method, you should keep in mind the following:

  • To the extent possible, test your product side-by-side with a similar material with a known field history (control).
  • At multiple time intervals, monitor your product’s performance by measuring relevant mechanical properties. Doing so, it will provide you with a better understanding of your product’s behavior. It will also help you extrapolate its performance as a function of time to some extent.

While this test method uses a fluorescent light source, other practices, for instance ASTM G155, use Xenon Arc UV light sources. Both of these UV light sources are used to predict the effect of sunlight exposure, either outdoor or indoor, on your product on an accelerated basis. To determine which is best suited for you specific needs, please see; The Difference between ASTM G154 and G155 and which is Right for you.

Micom offers polymer testing services for a wide selection of material and products. For more information about the ASTM D4329 test, do not hesitate to get in touch with our specialists.

Micom Laboratories is a third party industrial material testing laboratory accredited by the Standards Council of Canada, CGSB, ISTA and many other organizations.


All of the information and opinions contained in this blog are made with the information, and the understanding that we have reviewed at the time of publishing.  However, despite our efforts, we do not offer any guarantee of their accuracy, thoroughness of our investigation or validity. The author of this blog is not liable for any inaccuracies or any losses or damages that may result from the use of the information or data contained herein. This blog has not been reviewed or verified for its accuracy by any peer group associates prior to publication.

Michel Comtois

Michel Comtois is an accomplished founder and CEO of Micom Laboratories Inc., an ISO/IEC 17025 (2017) A2LA-accredited independent laboratory specializing in product and material testing services. Before establishing Micom Laboratories in 1999, Michel, who also holds a Master’s degree in Physical Chemistry, gained extensive experience over a 14-year tenure managing departments spanning physical chemistry, physics, mechanical and material testing in research and contract laboratories. This exposure granted him a profound understanding of the intricacies of development and material testing processes.

In addition to his practical experience, Michel has played influential roles on various voluntary technical committees. He notably, served as the chairperson for CAN/CGSB 44.227 and the Head of the Canadian Delegation for ISO TC 136. He also contributed to the following technical committees: CAN/CGSB 44.229, CAN/CGSB 44.232, ANSI/BIFMA X5.1, ANSI/BIFMA X5.5, ANSI/BIFMA X5.6, ANSI/BIFMA X 5.9 ANSI/BIFMA X5.11, ISTA Certification Council.

Leveraging his unique expertise, he has led Micom Laboratories to become a renowned name in its niche, now operating out of a 16,000-square-foot test facility in Montreal, Canada, and serving a diverse customer base with an array of material and product testing services. Follow Michel on LinkedIn

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