1) 8-mm thick quilted fiberglass.2) 2-mm thick EPDM mass (4 kg/m2).3) 20-mm thick 30 kg/m2 polyurethane.4) Adhesive.Use tape 65.095.00 as finishing.Type-tested in compliance with ISO 4589-3 defining the oxygen index by means of a high temperature test.R.I.N.A. certified for soundproofing of engine rooms in pleasure boats up to 24 m.