Johns Manville Incombustible Microlite® insulation provides excellent acoustical and thermal performance for use in a variety of marine applications. It is the recommended solution when design parameters prohibit the use of a rigid product. Incombustible Microlite is manufactured using our flame-attenuated process, delivering a product that is resilient and lightweight . In addition, it is US Coast Guard approved and complies with US Navy and Nuclear Regulatory Commission product standards.