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MMS- Are some unreliable with high RH?
11-07-2011, 07:23 AM
Post: #5
RE: MMS- Are some unreliable with high RH?
Great question Pat, it is one that confuses me also.

The specs and requirements of MMS manufacturers I am familiar with all vary somewhat. Some will not warrant their product unless there is a vapor retarder under the slab. Some limit RH to 95% or less. One is limited to 98% RH. Many warrant to any RH, but will deny coverage because the alkalinity is too high.

Why am I confused when these numbers seem so clearly defined? The numbers are not firm. The MMS I mentioned that is good to 95% RH is a two part 100% solid epoxy system. I mentioned to my factory rep that I had a project with no vapor retarder and a history of failure. These are the worst possible parameters and RH values can reach 99%. No worries I was told, the technical team has approved the use of our MMS on that slab. Huh

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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RE: MMS- Are some unreliable with high RH? - CC Solutions - 11-07-2011 07:23 AM