The Dynaliner is the perfect ultra light weight insulator to use on top of Dynamat. This durable crush and tear resistant material has the highest heat blocking properties available in a single layer synthetic foam-type material. Dynaliner isn't affected by oil and does not absorb water. Dynaliner provides acoustic isolation and excellent thermal insulation for roof, firewall, floor,quarter panels, doors and even as a hoodliner 81.3cm x 137.2cm