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Old 01-25-2011, 01:14 PM   #1
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Fixing Rod Holes in Foundation


I have a poured concrete foundation and I have some discoloration on my walls. One of them has some water marks but I have about 15 total that have noticeable discoloration. I found a product online that is a swell plug that basically plugs the rod hole, then expands if it reacts with water to seal the hole. I would then apply hydraulic cement to level the wall. Has anybody ever heard of this type of plug and do they work?

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Old 01-25-2011, 01:53 PM   #2
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Fixing Rod Holes in Foundation


Hydraulic cement is not to be used to level out an area.

The product you are considering may actually be hydraulic cement sold under a product brand name supported by advertising.

Hydraulic cement is meant to be applied to a relatively narrow crack or opening and can be used even in damp areas. It should be mixed in small amounts in a relatively moist state and forced or packed into the gap. The small expansion locks it into the opening as it expands. Since it is cement based, the bond is very good chemically and is mechanical because of the texture of the gap, plus any moisture enhances the long term curing. - Been used for decades on civil and engineering projects.

Dick

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Old 01-26-2011, 07:29 AM   #3
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Fixing Rod Holes in Foundation


So, it sounds like I'm better off just using Hydraulic Cement and not buying the plugs.

Thanks.
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Old 01-29-2011, 01:36 PM   #4
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Fixing Rod Holes in Foundation


Hi,

It seams we have a similar problem. I also have rod hole leaks in a poured concrete foundation (see "foundation leaks" post).

The hole size in my basement walls is roughly 5/8" diameter. It sounds like this may be too large for hydraulic cement repair based on the response from "concretemasonry". There are kits available to inject polyurethane foam into cracks that may be more effective or longer lasting. One of these products is Sika brand available at Lowes, at least in Canada.

I'll be watching both posts for an expert answer. My research elsewhere seems to lead to biased opinions base on what they are selling.

Good luck.
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