What type of encapsulant allows for visible inspection of the surface below?

The type of encapsulant that allows for visible inspection of the surface below is the bridging encapsulant. Bridging encapsulants are designed to form a thick, durable coating over asbestos-containing materials, providing a protective barrier while still allowing for the underlying surface to be seen. This visibility is crucial for future inspections or monitoring, as it enables the identification of any deterioration or damage to the asbestos material, ensuring ongoing safety and compliance.

Penetrating encapsulants, on the other hand, work by soaking into the material rather than forming a visible outer layer. They stabilize the asbestos but do not allow for visual assessment of the surface beneath. Thus, when determining which encapsulant type allows for visible inspection, bridging encapsulants are the correct choice, as they maintain a balance between protection and the ability to observe the condition of the underlying surface.