Google Plus IconFacebook IconTwitter IconYouTube IconCart IconChimney IconSkype IconTool IconVideo IconChevron IconClose IconArrow - UpArrow - DownEnvelope Icon

Chamber Safe Refractory Parging Material

Chamber Safe is a refractory parging material used to repair your masonry fireplace smoke chamber, vent connections, masonry heaters, and more. Easy to work with and adds structural strength.


Chamber Safe is a UL listed refractory parging material designed to restore and strengthen the smoke chamber area in a masonry chimney. Chamber Safe will smooth out jagged, corbelled walls and will create a smooth transition from the smoke chamber to the flue liner. Use Chamber Safe to strengthen, streamline, and restore your masonry fireplace smoke chamber. Available in a 5-gallon container (30 lbs.). One 30 lb. container will cover four square feet at 1 1/2" thickness, or six square feet at 1" thickness.

Chamber Safe Can Repair:

  • Masonry Heaters
  • Fireboxes
  • Vent Connections
  • Firebrick & Masonry in Smoke Chambers
  • Ash Pits
  • Clay Flues
  • Kilns
  • Masonry Ovens
  • Masonry Walls
  • Wood Stoves


  • Improves draft
  • Superior adhesion
  • Easy workability
  • Adds structural strength
  • Rated for temperatures up to 2650 degrees Fahrenheit
  • Designed for parge or cast applications
  • UL listed (UL 1777, ORD 2505)
  • Chamber Safe Brochure Link 

Installation Instructions

Link to Full Installation Instructions

Brush off and remove any loose masonry or soot from the surface.  Predampening is not needed however some prefer to do so.


  • Use only containers and mixing equipment that are free from other masonry or other residues.
  • Clean plastic or metal containers work best. Dry mix desired quantity thoroughly first.
  • Approx. Ten lbs. at a time is a good quantity to start.
  • Use only clean, cold water. Hot water will quicken the set time.
  • For trowel/parge application add 6-8 cups of water for ten lbs. of Chamber Safe. Mix very thoroughly. For cast application add 8-10 cups of water for ten lbs. of Chamber Safe.
  • Mix very thoroughly.
  • Cast into form configured as may be needed.
  • The quantity of water may be slightly adjusted by the installer to their preference.


  • Apply with desired hand tool (parge or trowel) over the desired area one to two lbs. (per trowel) at a time.
  • Compress to assure no voids in the area of application.
  • Apply first coating ½” to 1 ½” thick. If another coat is desired apply ¼” to ½” thick to obtain desired total thickness. If second coat is to be applied rough up or score the surface of the first coat. This allows for superior bonding of the second coat application.
  • Allow first coat to air dry before application of the second coat.
Write Your Own Review
You're reviewing:Chamber Safe Refractory Parging Material
Your Rating