ChimneyRx Masonry Crack & Joint Sealant is a brushable elastomeric sealant used to repair exterior cracks in mortar joints on chimneys, brick walls and between concrete or stone masonry units. It seals larger cracks and other defects that cannot be corrected with water repellents alone.

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.

• When applied to a properly prepared wall or chimney surface, ChimneyRx Masonry Crack & Joint Sealant can solve tough leak problems without the expense of tuckpointing 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.

Available Sizes: 1/2 gallon recyclable containers
Coverage Rate: A 1/2 gallon container will treat the mortar joints surrounding approx. 550 standard bricks, or approx. 100 sq. ft. of wall surface
Application Temperatures: Between 40-100 degrees F
Dry Time: 2 hours
Application Method: Brush
Cleanup: Soap and water