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Concrete Webinar
07-22-2011, 06:59 AM
Post: #11
RE: Concrete Webinar
(06-01-2011 08:16 PM)Ernesto Wrote:  I have used the poly foam for some cracks as well. Just off the shelf stuff. I see Koester has some nice stuff, wonder if I can get those tubes here.

Also the dewpoint chart on Koester is awesome and is even color coordinated.

The polyurea I use is made by Euclid Chemical called Qwikjoint 200.
It's a wonderful product, gells in about 7 seconds, can be easily trimmed for several hours. Costs me about $28 a twin-tube.

The downside of the product is that it sets so fast. If you don't keep the stuff flowing it will set in the mixing tube.

The upside of the product is it sets so fast. Big Grin You can trim it flush almost immediately, and go over it with patch immediately.

JD Grafton
Concrete Answers for Flooring Problems
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07-22-2011, 01:19 PM
Post: #12
RE: Concrete Webinar
You can patch over polyurea?
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07-22-2011, 02:21 PM
Post: #13
RE: Concrete Webinar
You bet your booty.... I've got hundreds of thousands of square feet down with not a single issue! Cool

If you look up that product, it's for concrete repair....

JD Grafton
Concrete Answers for Flooring Problems
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07-22-2011, 06:41 PM
Post: #14
RE: Concrete Webinar
But the Koester does not require mixing does it? I watched the video of them doing vertical cracks but kinda forgot if there is mixing involved.

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com
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07-23-2011, 07:47 AM
Post: #15
RE: Concrete Webinar
(07-22-2011 06:41 PM)Ernesto Wrote:  But the Koester does not require mixing does it? I watched the video of them doing vertical cracks but kinda forgot if there is mixing involved.

I fill cracks with the Qwikjoint 200. It is a two part polyurea. I use Koster epoxy, Koster primer, and sometimes Koster self-leveler, but Qwikjoint crack repair.

JD Grafton
Concrete Answers for Flooring Problems
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07-26-2011, 03:02 PM
Post: #16
RE: Concrete Webinar
But you can't use a semi-rigid polyurea except under a koester like product. You can't use it for patching (in lieu of a cementuous patch like feather finish) for under resilient. Right?

A semirigid requires something rigid over it our the resilient flooring will telegraph those joints.
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07-26-2011, 03:06 PM
Post: #17
RE: Concrete Webinar
I use the polyurea over the Koster. Semi-rigid is the way to go, you do not want a product harder than the concrete itself or you will risk causing meandering cracks.

We used to use MM80, which is also a semi-rigid....

JD Grafton
Concrete Answers for Flooring Problems
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