Hi. I’ve chipped the render off my old chimney back to brick. I have wire brushed all the loose stuff off. So far have used no chemicals. Q. What is the best prep before sealing?
Diluted Hydrochloric Acid is used by brick layers to clean excess mortar off bricks. You can buy it at hardware stores. I love your bricks. It’s hard to tell from the pictures if much cleaning needs to be done. You don’t want to erode old mortar. I’d consider giving them a wash with soapy water and if you’re happy with the look nothing else needs to be done. Your chosen sealing product may also have preparation suggestions.
bigreader
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