It was interesting to me that when a material goes for a "Fire
Designation Rating" the exposed burn times are based on 1 hour and 2
hour ratings. The first being residential.... the second commercial. I
have deliberately exposed my formulas to 1 hour at the mercy of a blow
torch. All that has ever happened is a charring and weakening. No
continued burning of any type has ever happened.
In my conversations about formulas and there significance the subject
often turns to "Presto-logs".
Bob M.
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