ASTM Water Vapor Transmission Rate Test Method F3299 was recently published by ASTM International. Due to its similarity to the ASTM standard F1249, there has been some confusion surrounding the two standards. Some questions that our customers had were:
  • Is one better than the other?
  • What are the differences between F3299 and F1249?
  • Does F3299 replace F1249?
  • Why would I choose one over the other?
  • What are the proper applications for F3299 and F1249?
  • What should I consider when choosing either F3299 or F1249?
  • Do I need to purchase a different analyzer to comply with the new standard?

Due to this confusion, we have created some materials that will hopefully help you to easily compare both ASTM methods and assist you in choosing which one is right for your specific application.

Download the related materials by clicking on them in the Related Resources section to the right.

Have further questions?

Contact one of our Permeation Specialists and we can assist you in finding which method, sensor, and/or instrument is perfect for your specific application. 

Email us at, fill out our Contact Form or call 763-493-6370  -  we look forward to speaking with you!