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Ardex V1200

JD - Please PM me a news link!! I want to know what company it was.

Just got off the phone with Ardex and they suggest I also consider K301 for indoor use under moisture systems (like Koester people use RapidSet) - unsure but I am going to run it by the boss.

Also Ardex recommended I closely check out Ardex MRP for patching / feathering under moisture systems. Will get a few bags to the guys to test out & play with.

K301 and MRP would both be suitable UNDER the mitigation system. They are unaffected by moisture which will probably be really high under the MMS. I have not used these products yet, but I have used some great hydraulic cements from Home Depot that set up in minutes. What Ardex wants is a product that is unaffected by moisture and solid enough to handle their epoxy mitigation. If you have time, go with their recommendation. If you are in a pinch (discovered a hole or big spall and don't have a patch) you can probably use a good rapid setting hydraulic cement.

Never install Feather Finish or any interior self-leveling underlayments under an MMS. Wink
JD Grafton
Concrete Answers for Flooring Problems

"good rapid setting hydraulic cement" yep been using a lot of CementAll recently. I am told that the guys can hit it with grinder and get a nice smooth flat finish, even if sandy.

But it isn't self leveling. So, we are looking for something else.

Tec / Chapco has really come to the table and stocked up in California with their product for under ceramic and that is working well for feathering.

Oh, I see. You want self-leveling under your epoxy.
I can't help you there. I used Koster's stuff before, but never the K301.
If you use it let us know how you like it!!!
JD Grafton
Concrete Answers for Flooring Problems

Koster and Aquafin both require application over prepared concrete only, as does Ardex with the exception of its MC over K301. That being said, I'm still a firm believer in appication of all MM systems as close to the source as possible (even Ardex). Stick with what works time after time and you'll never go wrong.
JK Nixon
Concrete Restoration Services, LLC
Pittsburgh, PA

Not exactly CCR.... Wink

There were times when Koster required me to use a 'barrier product' between the concrete and the epoxy mitigation. They want to see a rapid set cement used as a buffer between concrete with high concentrations of silicates and the epoxy. Talk about a pain in the behind on large jobs..... They want rapid set and the stuff sets in a matter of minutes. So you mix a 5 gallon pail and run to your work area and beat it out of the bucket then pound it onto the concrete surface and by that time the stuff is so stiff you can't work it. Luckily the biggest job we did that on was 10,000sf.... ExclamationExclamation Dodgy

We also must fill holes, spalls, large voids etc., and for that they recommend a fast setting cement. Sometimes you just have to patch under the epoxy mitigation. But I agree the fewer layers, the better off you are.
JD Grafton
Concrete Answers for Flooring Problems

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