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Caulking, also called non-corrosive (NC) compound or putty, is brown to dark grey. It is soft and flexible, but sets hard to seal joins and prevent leaks of water, heat or air. If NC compound or putty has deteriorated and dried, there may be white dust on the surface. This white dust is friable asbestos. Caulking may be found in:
Treat damaged or deteriorating asbestos-containing caulking as friable asbestos. Undamaged asbestos-containing caulking is likely to be non-friable asbestos.
Commercial, Residential, Industrial, Community infrastructure and spaces
Windows, Mouldings and moulded products, Electrical and power boxes, Plant and machinery, Plumbing and drainage, Roofs and eaves
To seal joins, cracks and holes around windows and other openings. In substations and cable pits, caulking was used in cable ducts and equipment hatches. It also sealed cables inside conduits. NC compound, also called mastic sealant, was used to seal cable penetration points.
Cable caulking, Sealing compound, Conduit seal and air conditioning duct flange mastic, NC compound
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Asbestos-containing putty in window frame
Asbestos-containing window putty
