Efflorescence Remover


removes efflorescence, mortar smears, grout haze, hard water deposits and atmospheric staining.


Use Efflorescence Remover, by Cathedral Stone Products, to remove efflorescence (crystallized salt that forms on masonry), mortar smears, hard water deposits, grout haze, and atmospheric staining. Easy to use and biodegradable! Apply a thick even layer with a brush or roller on a DRY substrate. Let sit for several minutes. Then scrub with a nylon brush. Rinse and reapply if needed. Surface temperatures should be between 40°F to 95°F.  Dwell time increases as the temperature lowers.

Always prepare a mock-up. If using various products to determine the stain, label the mock-up and dwell times to determine suitability of product to stain. 

A 5 Gallon Bucket typically covers 750-1000 ft² applied as a thick film. 

A 1 Gallon Bucket typically covers 150-200 ft² applied as a thick film. 

Read and follow all manufacturer’s instructions. 

Do not allow product to freeze. Do no use in freezing temperatures. We cannot ship this in freezing temperatures. 

Made in the USA! 

Pallets available. 

Freight Orders: 

Please call as we put the order out to bid to get the best rate for you.

Data/Installation Instructions


Additional information

Weight N/A
Dimensions N/A

12 Ounces, 1 Gallon, 5 Gallons


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.