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  • Item: ChimneyRx Masonry Crack & Joint Sealant
  SKU: SS70064  Q/A: data-sheet
  Size: 1-Pint or Half Gallon
  Appearance: White Viscous Liquid
  VOC Content: 84 g/L  
  Case Pack: Pint (4/case)
Case Pack: 1/2 Gallon (1/pkg)
  UPC Code: 7-09057-70016-0 / Pint
UPC Code: 7-09057-70064-1 / Half Gallon
  Quick Product Facts  

Chimney RX Masonry Crack & Joint Sealant is a brush-able elastomeric sealant used to repair exterior cracks in mortar joints on chimneys, brick walls and between concrete or stone masonry units. The product seals larger cracks and other defects that cannot be corrected with water repellents alone. Chimney RX Sealant seals cracks up to 1⁄8 inch wide on brick faces and at mortar and brick joint interfaces to provide waterproof protection. It dries clear to milky white, depending on the size of the crack. Product prevents water infiltration and subsequent damage, yet allows water vapor to escape.

  • Prevents leaks through mortar joints.
  • Seals crack up to 1/8 inch.
  • Easy brush application.


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  ChimneyRx Masonry Crack & Joint Sealant

ChimneyRx Masonry Crack & Joint SealantBenefits of Masonry Sealant:
When applied to a properly prepared wall or chimney surface, Chimney RX Masonry Crack & Joint Sealant can solve tough leak problems without the expense of tuck pointing or surface grouting. Product will not significantly change the appearance of most walls, chimneys or masonry surfaces. A slight gloss will occur on dense surfaces which will lessen over time. Testing is recommended before treating any surface to ensure desired results. On larger cracks, some "milkiness" in color may develop.

What are the Coverage Rate(s):
A half gallon container of Chimney RX Sealant will treat the mortar joints surrounding approximately 550 standard size bricks, or approximately 100 square feet of wall surface. Actual coverage rates will vary with the size of masonry units, the degree of damage, and the width and porosity of the mortar joints.

When to Apply:
Surface and air temperatures should be a minimum of 40° F and a maximum of 100° F for two hours following application.  Apply product only when temperatures exceed 40° F. 

Do not apply to frozen or frost covered surfaces.

How Long to Wait:
Dwell time varies dependant upon filled crack size, but normally dry to the touch within two hours.

Tools You Will Need:
This product is engineered for brush application using specially designed brushes included with the product.

Other equipment: scraper/knife, polyethylene sheeting or similar, empty pails & rags for clean-up, access to running water.

Safety Precautions to Observe:
Proper safety procedures should be followed at all times while handling the product. Wear chemical resistant gloves and chemical splash goggles. 

Refer to the Material Safety Data Sheet for important health and safety information before use.

  Worth Quoting...  
" This product may not be suitable for use on extremely dense or polished surfaces. This product is not suitable for use on asphaltic surfaces. This product is not intended for exterior below grade use or for resistance to hydrostatic pressure. "
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