white streaks on brick

[Mark Wendt]

anybody know what i can use to get this off the brick, looks like its coming from the trim at the top, tried everything i had on the rig sodium hydroxide, ox, hot water nothing touched it.
Thanks

 

[Mark Wendt]

close up pic of stian

 

["Red"]

It's hard to tell, but is the mortar (near the roof line) gone or is it black?

 

[Mark Wendt]

its black-mildew/mold

 

[pdmcali]

It is Efflorescence you should be able to use OneRestore and get it off.

 

[Mark Wendt]

I think it's. chalky paint from the trim above

 

[ACE PAINTING]

Try a graffiti remover.

 

[Mark Wendt]

Good idea thanks

 

[Mike@Sunbritesupply]

Have you tried Pro BRC?

 

[N.A.P.W.O]

If it is efflorescense then an acid cleaner should work. You mentioned that you used the OX. Did that do anything? It may have just been too weak. If nothing happened, then it probabply is oxidation run-off from the cap like you said. In that case I agree, the graffiti remover should work nicley. Test-patch-test-patch-test-patch...

 

[Mark Wendt]

Mile what is BRC?

 

[Mike@Sunbritesupply]

Pro BRC This STRONG acid-based cleaner is fast on mortar and concrete splashes and is perfect for tool clean-up.

Works better and faster than acid alone. Provides the advantage of lifting the splash from the surface with less scrubbing or blasting. Extremely fast when applied through a pressure washer. Powerful cleaner saves time and effort.

Works well for attacking all minerals such as rust, calcium, and lime. Attacks red clay stains, so it is great for cleaning off the red clay "splash-up" found on buildings all over the southeast.

Works with hot or cold water to renew masonry surfaces effectively and quickly. Concentrated, so it can be down-streamed through your pressure washer. One gallon makes 5, so it costs only about a penny per square foot to use.