Hydrualic cement? Pros and Cons ? Help!

Old 03-24-11, 09:28 AM
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Hydrualic cement? Pros and Cons ? Help!

Anyone use this stuff? I have some joints inside and outside that I need to patch up. They are between the base of the wall and the floor. The outdoor gets alot of moisture and is against the foundation of the house.(It is slightly sheltered) The indoor is subterrain and did have some flooding but not for many years. Just want to seal up the gaps. Go with regular cement, hydraulic or other products?
Any advise would be greatful!
Old 03-24-11, 09:40 AM
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Tar would probably be a better bet. Cement tends no to adhere to older cement.
Old 03-24-11, 09:59 AM
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Hydraulic cement has been around much longer than you and has been used in many residential, commercial, industrial and civil projects. It is great and effective is used properly for the right purpose.

It is not a flexible coating. It is intended to be used to stop leakage in a STABLE crack that can be widened enough to force it into the deepest portions of a crack/joint. It works by expanding slightly to form a tight stable key as it sets very quickly. One of the great points is that it can properly used in a moist area and adheres very well due to the side of the joint and compatibility of the materials. The organic or petroleum based coatings and caulks are subject to future deterioration from moisture, temperature extremes and oxidation/evaporation.

Hydraulic cement is not to be used as a coating. A temporary flexible coating will work depending on the durability of the coating for the exposure. A more profession method for UNSTABLE cracks is to open and clean joint, put in a foam backer rod well below the surface of the slab and then caulk with the best, most durable flexible caulk you can find locally. The caulk is not cheap compared to the junk you see in a big box store.

Old 03-24-11, 10:01 AM
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Can you describe the joints a bit better? Are they cracks in a cement foundation, failing mortar between blocks?

I've used hydraulic cement to repair foundation cracks that were actively weeping and to plug a hole in a slab that was actually bubbling up fron ground water pressure. If you have that sort of situation it's a good choice.

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