From Condemned to Clean: Turning Stage 3 Glaze Into a Premium Restoration Service with LCR

According to local fire chiefs across the country, the number one cause of residential structure fires is failure to sweep the chimney properly. Creosote is a natural byproduct of combustion that accumulates on the walls and in the crevices of the chimney and flue whenever wood logs are burned. Sadly, the majority of stage 3 creosote glaze ignites into a blazing fire in the middle of a very cold winter’s night when everyone is asleep. According to the Chimney Safety Institute of America (CSIA), as little as 1/8” of creosote is dangerous and must be removed.

What is Liquid Creosote Remover (LCR)?

LCR® (Liquid Creosote Remover) by Approved Industries is an advanced, professional-grade chemical solution specifically formulated to tackle third-degree glazed creosote.

Unlike other creosote removal products, such as dry powders that can miss certain high-risk areas in the flue and smoke chamber, LCR is a proprietary liquid blend applied directly to the masonry surface. It works by penetrating, dissolving, and absorbing the hardened glaze, even in cracks and crevices. As LCR goes to work, it breaks the bond between creosote and the masonry, allowing the glaze to lose its adhesive properties without damaging the underlying surface.

The Three Stages of Creosote

Creosote is like a chameleon. It morphs into different physical properties, changing its characteristics at every stage as it grows increasingly dangerous the longer it remains in the chimney.

• Stage 1 Creosote is a flaky, dusty powder that is easy to remove with a chimney brush.

• Stage 2 is a hard, crunchy, or shiny deposit, resembling burnt sugar crystals or honeycomb. It requires a rotary brush to remove this hardened, flammable material.
• Stage 3 is a tar-like glaze that coats the flue tiles like thick black glass. It is a highly concentrated, highly flammable fuel. Stage 3 creosote cannot be removed with standard brushing; scraping it can destroy the clay tiles beneath. Historically, chimneys with severe Stage 3 glaze were condemned unless the homeowner relined the chimney.

Using LCR for Premium Chimney Restoration

First, a factory-trained technician seals off the fireplace opening to keep chemicals out of the living room. Technicians wear full PPE, including chemical-resistant gloves and respirators.

Next, LCR is supplied in 5-gallon containers containing varied particle sizes that settle during transit. The specially trained sweep uses a heavy-duty drill and mixing paddle to blend the entire bucket thoroughly before application.

Then, using professional sprayer equipment (like that found in Thermocrete or Smoktite) or manual brushes for accessible spots, the tech evenly coats the glazed flue tiles. One bucket generally treats 15–20 linear feet of standard clay tile.

Lastly, as LCR dries, it breaks chemical bonds, causing the glaze to crack and peel off for safe, easy removal. LCR requires 24 to 48 hours to dry under natural airflow (accelerated by heaters or fans if needed).

LCR is a safer and more effective way to remove stage three glazed creosote when used as directed by a trained professional sweep. It provides these added benefits:

• No Toxic Dust: Traditional dry powder treatments release fine chemical particles into the air. LCR’s liquid formulation eliminates this exposure completely.
• Precise Application: LCR ensures complete coverage of glazed tile, seeping into hidden pockets and tiny crevices that powders often miss.
• Easy Removal: Instead of tediously scrubbing baked-on creosote, LCR alters the material's chemical structure, making removal safer and easier.
• Compliance and Safety: Remove dangerous fire hazards to restore your fireplace to compliance with local building codes without a tear-out and chimney relining.

Where to Buy Professional LCR Creosote Remover Near Me

Ready to Turn a Condemned Flue into a Premium Restoration? LCR® by Approved Industries allows chimney professionals to offer clients a safe, dust-free, and tile-preserving chemical solution.

Visit our website to become a factory-authorized applicator, find a certified installer near you, and explore our full line of advanced coatings and thermal-protective systems.