This brush-able sealant is used to repair exterior cracks in mortar on chimneys, brick walls and between concrete or stone masonry units. It seals larger cracks and defects that cannot be corrected with water repellents alone.
No water repellent can stop water from penetrating small holes and visible cracks and every chimney has them. Crack & Joint Sealant is a unique breathable, silicone elastomeric sealant. Crack & Joint Sealant can be used to seal minor cracks up to 1/8 inch in mortar joints where the mortar and chimney are otherwise sound.
Note: Not recommended for use on brick faces
Product Data Sheet