Save 10% on Stove Pipe. Shop Now!

ChimneyRx Masonry Fireplace Chimney Water Repellent - 1 Gallon

In Stock: Ships in 1-3 Business Days
Low Stock!

ChimneyRx Masonry Chimney Water Repellent is a modified siloxane based product specifically designed for chimneys to penetrate deeply in to most masonry and concrete pores. Unlike acrylics, silicones, and other waterproofing sealers that form a film on the surface and trap water vapors, ChimneyRx masonry waterproofing products allow deep penetration of the active ingredients of up to 1/4 inch or more. As a result, the special siloxanes in ChimneyRx Masonry Chimney Water Repellent react to form strong chemical bonds beneath a treated surface. These bonds allow the product to become a physical part of the structure and provide long-lasting water repellent protection without altering the appearance of the brick.

ChimneyRx Masonry Chimney Water Repellent is 100% vapor permeable, which allows the water vapors to escape. This reduces costly chimney repair such as spalling, scaling, deterioration, and freeze-thaw damage that results from trapped moisture when film-forming water sealers are used. The best way to prevent chimney water damage is by using chimney repair products such as ChimneyRx penetrating (non film-forming) water repellents that will allow vapors to pass through.

Additional Information:

  • Prevents Water Penetration
  • Keep Masonry Looking New
  • Will Not Alter Surface Appearance
  • Mildew/Fungus Resistant
  • Water-Based, Environmentally Friendly
Container SizeApplication TemperatureApplication MethodDry TimeClean Up
1 Gallon 40? F MinimumPump Sprayer or Airless Sprayer1-2 Hours- Allow 6 hours before rainfallSoap and Water

Coverage Rates

95-150 sq. ft.50-75 sq. ft.75-150 sq. ft.75-150 sq. ft.75-150 sq. ft.75-150 sq. ft.

Adobe PDF File Icon View Product Data Sheet

  • 1 Gallon
  • Easily cleans up with soap and water
  • 40° F Minimum application temperature
  • Dries in 1-2 hours (allow 6 hours before rainfall)
  • Easily applied with pump sprayer or airless sprayer
  • Brick: covers 95-150 sq. ft., block: covers 50-75 sq. ft., concrete, stucco, adobe, and limestone: covers 75-150 sq. ft.
Please Note: Additional freight charges may be incurred prior to shipment if shipment by freight cannot be accepted due to size/quantity ordered.


  • Your prescription for chimney restoration with do it yourself convenience!

  • Protect & preserve
  • Remove unsightly stains
  • Repair leaking chimneys
  • Restore damage & deterioration
SaverSystems warrants this product to be free from defects.
1.00 (in)
1.00 (in)
1.00 (in)
Country Of Origin:
United States
Product Type:
Chimney Maintenance
_Base Price:
Left Overlay Image:
Made in America.png

You May Also Like

People Also Bought