Fabric loom- 5/8″ asphalt coated loom is constructed of a twisted paper and cotton-polyester blend weave tubing is saturated with an asphalt compound to bind the weave and prevent moisture absorption additionally- it is coated with a special flame retardant- black bituminous coating ideal in harsh environments temperature rating: 275 s.a.e. J-562 ford esbm3l38a- chrysler ms542- gm 676m- government hht791c- packard electric pm451