- Q. What material can be used to re-insulate steam pipes after the old asbestos insulation is removed?
A.The most common insulation now used on steam pipes is molded fiberglass sleeve with a plastic or fabric cover. This material is widely available from plumbing and heating supply houses. The fiberglass sleeves come in precut lengths for different pipe diameters (measured as inside diameters), and usually have self-sealing tape attached to seal the cover.