The ALL NEW 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.