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Radonseal, Thoroseal, WET (Conseal) for sealing basement concrete

Posted by enigma7 (My Page) on
Sat, Aug 23, 08 at 22:03

Hello all! I've been a member of the mulch/compost/lawn forums for a while but recently had some bad luck with water in the basement.

We had the perfect storm (I believe they say bad things come in 3's....) We got ~10" of rain over the course of about 5 days, found out both our main gutters were clogged; not in the gutters themselves (I routinely clear them out), but in the downspouts. And the final catastrophe was my basement dehumidifier (1 year old $250 Delohnghi) decided to freeze itself into a block of ice and not really do anything helpful except make a sporadic puddle on the floor.

So basically we didn't catch the problem until we had a massive mold problem (rubbermaid containers trapped the moisture between the concrete floor slab). Since that time we've had to throw out a lot of stuff that was destroyed, moved the rest to a storage facility, and killed the mold. On the outside we fixed the gutters and downspouts, re-mortared the perimeter of the house, and landscaped where we could to prevent the water from pooling against the house.

Now I need to get a product that will seal the basement concrete floor to prevent this from ever happening again. I have done quite a bit of reading but haven't been able to make a decision. The 3 main products I've come across are WET's Conseal, Thoroseal, and Radonseal. I have a very minor (<3) radon issue in the basement and at this time we do not spend much time down there, but if we could reduce the level it would be nice (we do not have fan remediation). But primarily it will be to prevent moisture from coming up through the floor.

Any help would be greatly appreciative!

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