Fire-proofed canvas?
What exactly is fire-proofed canvas?
Apparently you can treat cotton canvas with oil and wax and other chemicals so that it is fire-resistant. In our example of pre-heating an aircraft engine, you can burn a hole in a fire-proofed canvas with a gas torch, but the canvas will not sustain the flame once the source of ignition is removed.
So you can burn a hole in it, but it won't go WHOOMP! in a big fireball like in the movies. It still seems wierd that you can do this with cotton canvas, oil, and wax. Don't use it indoors. Don't put it over your car. It will harm the paint.
According to the Industrial Fabrics Association International (IFAI), the standard is known as CPAI-84
Get the whole PDF here
The current tent flammability standard, CPAI-84, was created in 1976 to limit the risk of fire in large paraffin-coated canvas tents, like those used to host a circus.
This is what REI thinks about Understanding Flame Retardants in Camping and Backpacking Tents
