Cement on Copper


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Old 04-12-07, 08:29 AM
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Cement on Copper

I have a water main coming through a poured concrete foundation. THe copper pipe main is encased in a black plastic sleeve. When it rains water comes in through this sleeve.

Can I fill the end of the sleeve with hydraulic water stop cement? I'm hearing conflicting info on whether the cement will hurt the copper pipe inside.
Feedback appreciated. Thanks
 
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Old 04-12-07, 09:19 AM
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Cement in general will eventually hurt the copper cement. I don't know about the hydro cement. Fill up the hole with silicone.
 
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Old 04-12-07, 09:45 AM
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Copper line

Don't use cement, like the other post said silicone is a better bet.

If this is a new prob. try to find out where the water is comming from, solve that prob. and you won't have to seal anything, luck.

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"If all else fails, read the directions"
 
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Old 04-12-07, 10:06 AM
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Wink

Like said find where the water comes from first. Use a silicone or better yet is a 3M marine adhesive/ sealant 5200 or a Marine Epoxy Putty. Dont put any cement around a copper pipe
 
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Old 04-12-07, 12:03 PM
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Guess I'm screwed. My 1964 built house has the water main coming up through the garage floor with nothing to protect the copper line from the cement.
 
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Old 04-12-07, 07:47 PM
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I used marine grade epoxy putty. I'll see the result next time it rains.
 
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Old 04-13-07, 08:37 AM
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Leak thru sleeve

Originally Posted by Gen
I used marine grade epoxy putty. I'll see the result next time it rains.
The prob. with water is if you don't stop where its comming from it will appear at another point, hope your plan works, luck.

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"If all else fails, read the directions"
 
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Old 04-17-07, 06:06 PM
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OK so we had heavy rain in NJ and I had used the marine epoxy putty before it started. Basically it held temporarily then started to leak. Just out of curiosity I applied this rubbery gutter sealant that can be applied when wet and bingo, it worked no more leak.

Now if I can just get the other little foundation leaks stopped.
What is the trick to using hydraulic cement??? Can it be applied while the leak is active? I did this and the leak wiggled its way to the edge of the cement.
Feedback appreciated.
 
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Old 04-20-07, 07:58 AM
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Hydralic Cement

I have used hydralic cement for 20 years inside sewer manholes to seal around pipes and stopping water infiltration from cracks. The key is to mix about a hand full at a time and use warm water. If it is good cement you will only have a few minutes of working time. Mix it thoroughly to the consistency of a slimy mudball and press it onto the crack and apply as much pressure as you can for two to three minutes, don't worry if it seeps some water by and repeat this again if needed after the first application. I have had to do this four of five times before I could stop the leak completely. Hope this helps...
 
 

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