This material is a closed cell vinyl/nitrile insulation foam. It is excellent for use any where in the cabin, firewall or bulkhead. It does not absorb water or oil and can also be used for heat insulation. This soundproofing insulation is also fire retardant and meets FAR25.853b, making it suitable for aircraft use. It is black, smooth on the inside, and can be installed using waterproof contact cement. Simple to install by cutting with an electric knife, scissor, or sharp knife. 48″ wide roll, sold by the linear foot. All sizes are certified. Burn test available upon request.