Which product is designed to be cut to fit around penetrations and installed to the surface of a barrier?

The correct choice is Composite Board/Sheet because these products are specifically engineered to be cut to fit around various penetrations in fire-rated barriers, such as walls and floors. They provide a durable and effective barrier against the spread of fire, smoke, and gases. The flexibility in size allows for a customized fit, ensuring that all gaps around penetrations are properly sealed.

Composite boards or sheets are made from materials that offer fire-resistance and can withstand high temperatures, making them ideal for maintaining the integrity of fire-rated assemblies. The application of this product involves securing it to the surface of the barrier, ensuring that the firestop system is complete and effective. This product is particularly useful in situations where traditional sealants may not provide sufficient fire protection or where additional structural integrity is needed.

Understanding the specific properties and installation methods of firestop products is crucial for ensuring compliance with fire codes and maintaining safety within buildings.