Insulation Burnthrough*

The Insulation Burnthrough test is used to evaluate the burnthrough resistance characteristics of thermal and acoustic insulation material when exposed to a high-intensity open flame.

Test Procedures

  • 14 CFR 25, Appendix F, Part VII
  • BSS 7387

*Tested at our partner lab


Test Description

A test sample consisting of two insulation blankets is placed onto a test fixture at an angle of 60 degrees. The sample is exposed to a high-intensity open flame for four minutes. The pass/fail criteria is based on flame penetration and a maximum heat flux value on the backside of the sample.

This test is typically used to show compliance with the following Federal Aviation Regulations (FARs):

    • FAR 25: 25.856(b)

What Products Require This Test?

The following products typically require the Insulation Burnthrough test.

    • Thermal Insulation
    • Acoustic Insulation