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ksmartbl

04:14PM | 10/16/04
Member Since: 10/15/04
2 lifetime posts
Bvmisc
Can someone tell me how to clean the brick on my newly built hearth? The person who built the fireplace and hearth did not finish, and there is dried mortar residue all over the hearth. I read on another site that a 9:1 ratio of water to muriatic acid could be used, but how is this applied? I've never dealt with acid of any kind.

Thanks in advance.

--k

Piffin

05:40PM | 11/14/04
Member Since: 11/06/02
1284 lifetime posts
The mortar is a base chenically. The acid couters the bonding effects.

Now for the problems. The acid is best applied within about 7 - 10 days afgter the work is doen. I imagine it may have been longer than that and that this means you could need a slightly stronger mix. Be very careful and study the labnle on the acid. It can burn you. Wear rubber gloves and eye protection!

Typiocvally, you wash it on with a scrubb brush, getting the surface fairly wet and wait a while, then wet again and scrubb away. Tghe acid will foam when it is working. Then you rinse thoroughly with clean water.

But another concern is what sort of finishes you have in around it. Gettin the acid on an oak wood floor, for instance, will turn the oak black, or nearly so. If that is the case, the mason should have used extreme care to avoid leaving the surface mortar in the first place. Sounds like you may have hired a hack to ruin the room, instead of a professional mason.

Excellence is its own reward!


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