The professional Multinopp insulation board is the ideal low-priced anti-drumming sound absorber for the engine compartment to get a grip on annoying and disturbing engine noises. Durable and easy to process. Flame retardant (up to approx. 300°C), open-pored polyester foam board with highly pronounced pyramidal structure for enormous sound absorption coefficient according to DIN 52215. 78% on average (100-1600 Hz). Dimensions: 100 x 6 x 100 cm