QUESTION:

I have a white streak of stuff forming on my brick. Above the brick is a concrete block. What is this?

PICTURE:

SOLUTION:

What you are describing sounds like Lime Run. Lime Run can develop in many ways but is always caused by moisture. You are probably getting moisture in the wall above the brick and it is traveling in the wall cavity until it finds a way out. When reappearing on the exterior of the wall, the moisture is bringing with it lime which is drying on the surface of your wall. This is a very tough stain but can be removed with either Sure Klean Heavy Duty Concrete Cleaner or Sure Klean Custom Masonry Cleaner by PROSOCO. To stop the stain, seek out the source of moisture and repair the area with mortar replacement, if needed, or apply a water repellant. On brick, we would recommend Weather Seal Siloxane PD by PROSOCO and on block use Custom Masonry Sealer also a PROSOCO product.

SUPPLIERS:

www.prosoco.com Link to the service provider page