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Comparison of Ensemble Total Inward Leakage Tests - FY12

NOTE: This page is archived for historical purposes and is no longer being maintained or updated.


  • To evaluate the three most commonly used inward leakage tests for personal protective equipment (PPE) ensembles including the Inward Leakage Test (SF6), Man-In-Simulant-Test (MIST) and Total Inward Leakage Test (Corn Oil)

Human subject testing

Applicable Standards

  • ASTM F2588, Man-In-Simulant Test Method
  • 42 CFR Part 84 - Respirators (Corn Oil)
  • NFPA 1991 (SF6), 1994 (MIST), 1971 (MIST), 1951 (MIST)
  • NIJ CBRN for Law Enforcement PPE (MIST)
  • ASTM for Air-Fed Ensembles (SF6)

Key Partners

  • N.C. State University
  • Underwriters Laboratories
  • Lion Apparel
  • NFPA
  • ASTM International


  • First Responders
  • SDOs
  • Test Labs
Logos of Key Partners

Project Scope

  • The proposed research effort will result a greater understanding of the three most commonly used inward leakage tests.
  • A range of ensembles will be selected and human subject testing will be conducted to compare and contrast the TIL tests.
  • Information on the TIL tests will aid SDOs in the development of standards and help to ensure consistent evaluation and certification.
  • Creation of ASTM standards for the SF6 and corn oil tests.


  • Project will be ending in FY12 due to lack of project officer availability


  • Presentations at Standards meetings (ASTM, NFPA, NIJ)
  • Input to standards development organizations (SDOs) for further TIL test development
  • Conference presentations and peer reviewed journal articles
  • Final technical report


  • Completed ASTM Test Methods for the Inward Leakage (SF6) Test and possibly the Total Inward Leakage Test (Corn Oil)
  • Incorporation of any recommended changes to NFPA, ASTM or NIJ Standards
Page last updated: April 17, 2012
Page last reviewed: April 17, 2012
Content Source: National Institute for Occupational Safety and Health (NIOSH)
National Personal Protective Technology Laboratory