Coating damp concrete
- Thread starter J_T_P
- Start date
LegacyIndustrial
ALLIANCE MEMBER
No polyurea will not work. Possibly waterborne epoxy or urethane slurry.
This water issue has to be top side not from the bottom or it will blow the epoxy off.
This water issue has to be top side not from the bottom or it will blow the epoxy off.
Last edited:
Garage Flooring
ALLIANCE MEMBER
A product will not work when you didn't identify the problem. The problem needs to be determined! Water in concrete travels through it like a sponge. The application of a liquid vapor barrier such as a Waterborne Single component polyurea will certainly do the job if the formula is designed correctly. The objective of a vapor barrier is to seal the majority of the pores within the substrate to block enough moisture transfer that the base coat material of your system can withstand the worst case scenario of pressure and still remain adhered to the substrate.
LegacyIndustrial
ALLIANCE MEMBER
Justin:
Who makes a single component waterborne polyurea vapor barrier that will cure over a damp surface?
Who makes a single component waterborne polyurea vapor barrier that will cure over a damp surface?
CamarosRus
Well-known member
Not single component but anybody heard of or use [BMAPAI[/B] or ARDEX sealants to
mitigate the water vapor transmission.
mitigate the water vapor transmission.
Garage Flooring
ALLIANCE MEMBER
I tried to reply to this earlier and the GJ site was down or at least I could not connect.
I actually contacted the division that does the manufacturing for us and spoke with the head of that department before I respond. While I am fairly technical, I wanted to check with the guys that engineer the stuff. We can make a single component that will work... That said the customer still has a problem that needs fixed... Also, as you know but for the benefit of the readers:
Proper surface preparation must be performed prior to application of any type of liquid vapor barrier. Shot blasting, scarification, grinding or acid etching are recommended. The surface should be as dry as possible and it should be applied midday, in low humidity! This will give the product the best chance of penetration through the pores of the concrete. Some times waterborne have cross linkers for exceptional adhesion to substrate and the following base coat.
LegacyIndustrial
ALLIANCE MEMBER
Again, if the moisture is coming from a source above the slab and is not pooling you can use a waterborne epoxy primer/coating. Example: Someone just ran the floor scrubbing machine over the slab or similar circumstances.
If the moisture is coming from beneath the slab you would need to apply a good 100% solids vapor barrier such as products by Aqua-Fin. Even then I am sure there can be no visible moisture present (floor cannot be wet at time of installation).
If you don't have experience dealing with this I would contact a pro for help.
If the moisture is coming from beneath the slab you would need to apply a good 100% solids vapor barrier such as products by Aqua-Fin. Even then I am sure there can be no visible moisture present (floor cannot be wet at time of installation).
If you don't have experience dealing with this I would contact a pro for help.
CamarosRus
Well-known member
Scotty Ive been researching this for MONTHS and still havent pulled the trigger
I was having trouble concluding where to move a staircase in my shop and i
finally am doing so.
There are MANY companies selling moisture vapor blockers with the leading
being KOSTER, AQUA FIN, MAPEI, followed by a ton of others. Some of the lesser known
names could even be relabled from another mfg.
Also there are several different chemical formulations that are being used
On top of all that some companies like KOSTER wont sell to a DYI....only
certified installers
And they all require shot blasting or grinding
Only conclusion for sure is to bring $$$$$$
I was having trouble concluding where to move a staircase in my shop and i
finally am doing so.
There are MANY companies selling moisture vapor blockers with the leading
being KOSTER, AQUA FIN, MAPEI, followed by a ton of others. Some of the lesser known
names could even be relabled from another mfg.
Also there are several different chemical formulations that are being used
On top of all that some companies like KOSTER wont sell to a DYI....only
certified installers
And they all require shot blasting or grinding
Only conclusion for sure is to bring $$$$$$
acer66
Well-known member
Oh boy, sounds like that is not as easy as I thought.
We have a most of the time damp concrete slap which is also poorly done in the basement.
Can't be redone or become a big ticket item but it sounds like to fix it will.
I thought I could just put something like Hydro lock on it and be done.
It is not a high traffic area more or less just storage.
Thank you
We have a most of the time damp concrete slap which is also poorly done in the basement.
Can't be redone or become a big ticket item but it sounds like to fix it will.
I thought I could just put something like Hydro lock on it and be done.
It is not a high traffic area more or less just storage.
Thank you
CamarosRus
Well-known member
bump
Garage Flooring
ALLIANCE MEMBER
Your intuition is absolutely correct as far as private labeling. A lot of the product on the market is simply a relabel of another product. Where that can get confusing is when you have 10 guys selling the same product each claiming theirs is better.
>>>And they all require shot blasting or grinding<<<
IMHO any good moisture barrier will require adequate prep. Shot blasting or grinding is best. We are doing some testing with a gel based acid etching compound on untreated floors and will post results when they are available. That said, this prep should be done before coating anyway.