Stove & Furnace Cement — Asbestos Exposure Crosswalk

What This Equipment Is

Stove cement (also called furnace cement, black furnace cement, or boiler cement) is a high-temperature trowel-applied paste used to seal joints and gaps in residential and small-commercial heating appliances:

  • Wood-stove door seals and pipe-collar joints
  • Coal-stove seals
  • Oil-furnace flue and breeching joints
  • Boiler hand-hole and clean-out covers
  • Fireplace damper seals
  • Chimney-to-appliance connections
  • Industrial small-furnace joint sealing

From the 1940s through the 1980s, the dominant brand families used chrysotile asbestos fiber in the cement formulation to provide heat resistance, crack control, and flexibility under thermal cycling. The product was sold in small cans and tubs through hardware stores, lumberyards, and stove-and-fireplace retailers — meaning homeowners and tradesmen alike handled it routinely.

Why Stove-Cement Work Was an Asbestos Exposure Pathway

Stove cement was applied wet — fiber release at the application moment was modest. The exposure pathway is primarily removal and replacement.

When a stove gets re-sealed (a routine seasonal maintenance task), the worker scrapes out the old, dried, baked-hard cement from the seal channel — chipping with putty knife, screwdriver, or wire brush. The aged cement crumbles and releases chrysotile fiber at close range, in the often-poorly-ventilated room where the stove sits. A new bead of fresh cement is troweled in, cured, and the appliance returns to service.

The exposure extends across:

  • Homeowners performing seasonal stove maintenance
  • Hearth-products retailers demonstrating and repairing stoves
  • Chimney sweeps performing routine inspections that included cement renewal
  • Heating contractors servicing residential oil furnaces and boilers
  • Industrial maintenance workers handling small furnaces and boilers

Manufacturers Named in Stove-Cement Litigation

  • Rutland Products — Rutland Fireplace Cement and Black Furnace Cement
  • Hercules / Loctite — patching and sealant products
  • DAP — patching compounds
  • Bondex / Reardon — patching compounds
  • Imperial Manufacturing — stove products
  • Johns-Manville — high-temperature cement products
  • Mortite — sealing products

Documented Product References

Images sourced from publicly available product-identification reference materials. Inclusion does not constitute a finding of liability against any company.

Trust Funds That May Apply

  • Manville Personal Injury Settlement Trust
  • Bondex Asbestos PI Trust
  • Various smaller consumer-product trusts

Categories Most Exposed to Stove Cement

Homeowners — particularly long-term wood-stove and fireplace users who performed their own seasonal maintenance through the 1970s and 1980s.

Trades: chimney sweeps, hearth-products retailers, heating contractors, oil-furnace service technicians, industrial small-furnace maintenance workers.

Cross-References

Compiled from publicly filed asbestos litigation, CPSC consumer-product records, and industry-publication histories. Product and company references reflect what has been alleged or documented in publicly filed litigation. This page does not constitute a finding of liability against any company. Not legal advice; consult a licensed attorney about your specific situation.