41. Investigators believe a rock band's pyrotechnics ignited polyurethane foam used for soundproofing, causing the fast-moving blaze. 42. Foam-in-place is another method of using polyurethane foams . 43. Polyurethane foam was sprayed over the framework under the supervision of the Los Angeles Fire Department.44. The company acquired Rynel, Inc . in January 2010, an American manufacturer of hydrophilic polyurethane foam . 45. The fabric is adhered to melted polyurethane foam . 46. The aircraft is made from welded steel tubing covered in a shell of polyurethane foam and fiberglass. 47. His tees are made of polyurethane foam and have four legs and a hole in the middle. 48. State law bars flammable acoustic material like polyurethane foam from the walls of gathering spaces like bars. 49. A polyurethane foam core, known as a blank, is cut and shaped to desired length and thickness. 50. The flames also set fire to polyurethane foam that is used to keep walls in the mine dry.
