ASTM E-136

If a material passes this test, it is non-combustible.

ASTM E-119

Hourly rating of a wall when exposed to fire. Determines how long that the wall holds back heat and flames.

ASTM E-184

Hourly rating for a sealant system for a penetra­tion through a fire-rated (ASTM E119) assembly.

ASTM E-84

Test measures how fast flames spread in a fire tun­nel lined with the tested material, compared to red oak, which is given a flame spread of 100. This test classifies materials as Class I, II, or III (or A, B, & C) See flame spread in the three rows below.

Class I or A

Flame spread less than or equal to 25

Class II or B

Flame spread 26 to 75

Class III or C

Flame spread 76 to 200

UL181

Duct materials, duct-closure systems, and duct sealants so labeled pass UL fire-resistance tests.