However, if asbestos-containing material is damaged, subject to being damaged, or must be disturbed as part of a remodeling project, then you should repair, encapsulate or remove it. Sometimes, asbestos can be repaired or encapsulated rather than removed. A few inches of torn, loose or frayed asbestos tape wrap on heating ducts can be sealed with paint or duct tape. Damaged hot water pipe insulation can be covered with a specially designed fabric available at safety equipment stores. Similarly, some asbestos applications that are in good condition can be encapsulated to stabilize them and reduce the likelihood of asbestos releases.
Encapsulation often is the best option when dealing with insulation on heating systems.
There are two types of encapsulants. Penetrating encapsulants seep into asbestos-containing materials and bond with asbestos fibers. They have little impact on the outward appearance of treated materials. Bridging encapsulating products , such as paint, coat asbestos-containing materials with a more durable surface. Homeowners should be aware, however, that although encapsulation seems like an attractive option, especially when dealing with furnace ducts or in sealing popcorn ceilings, there may be less obvious costs and risks involved.