Possible Clues:

• Widely banned building material
• A cry for help about top domestic hazard
• Potentially dangerous mineral like prime salt
• A call for help about leading carcinogen
• Answer SOS to protect finest building material
• Insulating material, like top of seals' heads
• Dangerous material? Most suitable to engage in a plea for help
• Chrysotile is the most common form of this incombustible material
• A boss set out to produce heat-resistant material
• Hazardous insulation material