Block foam polyurethane systems from Australian Urethane Systems Australian Urethane Systems Block foam polyurethane systems are available from Australian Urethane Systems . Block foam polyurethane systems: Fire Retarded PU, Polyisocyanurate (PIR) and specially formulated products - AS/NZS 3837:1998 Cone Calorimeter Test Performance certified products Density range from 35 to 200 kg / m³ Applications: Thermal insulation of roof / wall, tank, process equipment Pipe and vessel insulation / pipe supports Commercial, industrial, agricultural thermal insulation applications - PIR systems for cryogenic applications Marine buoyancy Formulated products for theme park movie set / special effects applications