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Old 08-30-2010, 03:17 PM   #1
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hydraulic cement

I am moving the main water line's entrance into the house which enters the basement thru a block wall. I've read to use hydraulic cement to seal around the penetration. Ok, fine, I bought some and read the instructions and it explains how to mix it and then says to keep it wet for 24 hrs . I highly doubt that everyone using this stands by with a hose for 24 hrs and dampens it down, so what should I do? Will it be ok to just dampen it down for a few hours after application? It is low 90s and dry here now.
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Old 08-30-2010, 05:08 PM   #2
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What they mean is that the area around the hydraulic cement be saturated with water before placement and remove any standing water prior to repair. You should also maintain or try to maintain the contact areas between 40 degrees F and 90 degrees F prior to repair and during curing period.
Note: when you mix this stuff:
1) You should wear protective gloves and or use a trowel
2) Mix only enough material as can be used immediately
3) Wear a mask
4) You can mold it by hand using gloves until it becomes warm
5) It will feel like putty when ready
I hope you know that hydraulic cement will not permanently repair cracks and joints subject to thermal or structural movement.
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Old 08-30-2010, 05:11 PM   #3
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f that hydraulic - just stuff the surrounding hole w/steel wool or foam peanuts & coat the wall w/fiber-reinforced roofing cement,,, hydraulic patches will eventually leak no matter how good your are
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