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ASTM D4799 standard now offered at Micom Laboratories

Micom Laboratories just added a new offering to its test arsenal: ASTM D4799 standard as part of its UV testing and material testing services. This method describes the procedure and the test conditions required for evaluating the weathering characteristics of bituminous roofing and waterproofing materials. More specifically, those attributes are assessed through the employment of UVA lamps. Lastly, in order to appraise changes in chemical and in mechanical properties of the sample, this method has to be paired with another standard.

ASTM D4799 test

The goal of ASTM D4799 is to supply the test conditions, and the procedure needed for an accelerated weathering test which will assess the weathering characteristics of bituminous substances through the use of UV testing. More specifically, it is by exposing the sample to a structured cycle composed of segments of UV radiation and condensation that it is possible to induce, on an accelerated basis, property changes in the specimen. These latter are either appraised visually by comparing the unexposed sample with the exposed one or with another test protocol following the exposure. Furthermore, it is possible to compare its performance towards a material of known characteristics by testing them concurrently. Lastly, it is important to mention that this test protocol does not establish a correlation between the natural and the accelerated weathering of the material, because there is a great variation of many parameters of the atmosphere. Indeed, it is not possible to define a proper acceleration factor, because the latter is sensitive to the formulation used in the sample.

Micom offers polymer testing services for a wide selection of material and products. For more information about the ASTM D4799 test, we invite you to contact our material testing laboratory today. It will be our pleasure to answer your questions about either of those tests.

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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