An open cell spray foam insulation, Classic Max is a one-step performance material that both insulates and air-seals a building for the lifetime of the structure. It also provides superior spray performance (up to 50% greater yield than competitive sucrose-based formulas), superior adhesion (to substrates and to itself), drip-free application, and advanced air pocket control. The foam insulation can be sprayed throughout the entire residential structure without an ignition barrier, including unvented attics. Icynene Corp.