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Posted by Jeff Wisnia on September 18, 2008, 6:49 pm
Worn Out Retread wrote:
>
>> mark wrote:
>>
>>> Greetings All.
>>> We just had a sustained rainfall and luckily had very little water
>>> come into the basement. The only spot it leaked through is a below
>>> grade concrete wall. I thought I heard of a product that expands as
>>> it cures in concrete. Is Hydroplug or Hydroseal something that sounds
>>> to familiar? Or any ideas to work from the inside? I realize that a
>>> proper fix is from the outside, but this was such a tiny leak, it's
>>> not worth digging in the neighbors yard..... TIA, Mark
>>
>> Me too, please! I have a small nuisance leak that shows up once or
>> twice a year, halfway up the poured concrete wall, presumably where a
>> tie bar between the inside and outside forms was. Murphy being Murphy,
>> the outside of the spot is buried under a low deck. Epoxy injection
>> seems to be a work-around worth trying, but I have never seen the kits
>> on the shelf at the borg.
>
>
> The epoxy injection works great. I watched the process at a neighbour's
> house and it was very interesting. The workman started at the bottom of
> the crack and epoxied in place several "nipples," that looked like the
> ends of caulking tubes, about 8 inches apart all along the crack. He
> then epoxied over the length of the crack and let everything cure. This
> took about 45 minutes or so. He then got the epoxy tube and a heavy
> duty caulking gun and starting at the bottom, he injected the epoxy
> until it started to come out of the nipple above the one he was filling.
> He then capped the nipple and starting injecting into the next nipple in
> line until the next nipple had epoxy show in it. This went on until he
> reached the top of the crack.
>
> We went outside and epoxy had made its way all the way through the wall
> and digging down a wee bit indicated that the epoxy had fully filled the
> crack as far as we could see.
>
> We have had several strong rain storms since the repair about 5 years
> ago and not once has this repair leaked a drop.
>
> I asked the worker where I could buy a kit to do the work myself and he
> stated that it was only sold to concrete repair companies and was not
> available to the public. He also stated that there were various
> viscosities of the epoxy and the one to use was determined by the width
> of the crack and the thickness of the wall. Too thin and the epoxy would
> just run out. Too thick and it wouldn't penetrate the crack fully.
>
> The job was done quickly (a couple of hours at most) and there was no
> cleanup to do at all.
>
> If ever I have a crack to take care of, that is the method that I will
> have to repair it.
Were the "nipples" removed after the epoxy in the crack set?
Jeff
--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.98*10^14 fathoms per fortnight.
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