Does Indutex use Serged Seams or Bound Seams? 
Yes, we call them Type 5-6 seams.  

Question:  What does the 3M Company say about Type 5-6 Seams vs. a Serged                         or Bound seam? 
Answer:    Type 5-6 seams offer the same protection as a Serged or Bound seam.   

Additional Resources:  A Technical Data Bulletin published by 3M, "A Seam is not always what it Seems."  They state that a Type 5/6 seam (European) is equivalent to a Serged or Bound Seam (USA)   

Question:    What do the experts say about Serged or Bound Seams? 
Answer:       Neither seam is suitable for a chemical suit.   

Additional Resources:   

Published in the World Journal of Textile Engineering and Technology, 2017 
"Seams for Protective Clothing – An Overview" 
By, Shanthi Radhakrishnan and Devendra Kumari 

Section 3.1.1. Serged Seams…. “it (a serged seam) is more commonly found on limited use in dry particulate protective clothing where dry particles are of concern.”
 
Section 3.1.2. Bound Seams…. “A bound seam is not suitable for a chemical suit as it is not liquid tight.”