The effect of high temperature additives in intumescent systems was ex
amined in a laboratory environment. A matrix of ceramic fibers/mineral
s was incorporated into two intumescent systems. The material performa
nce was determined using a series of small-scale propane-fired furnace
tests based on the ASTM E119 time-temperature curve for fire tests of
building construction and materials. Several formulations were identi
fied using a 15-minute screening fire test before testing for a longer
time period.