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Question about Polyurea coating

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kelashik

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Apr 2, 2021
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California
Arrived on this forum while researching epoxy coatings for my 1969 built garage floor. My research lead me to finalize on a PolyUrea based coating since part of the garage gets a lot of sun through the afternoon. Its 27'x25' three car garage. The concrete has some sort of paint on it (not a full coating, based on the thickness) and is in decent condition, with a few small cracks running through it.

I plan to fill the cracks, grind with a diamond brush and acid etch, before applying the PolyUrea coatings. Here comes my questions...

While talking to a Benjamin Moore rep about their Corotech V530/V531, they said PolyUrea does not require a primer but their epoxy coating does. Is that correct? When I tried to research on that topic on the forum, I did not see any examples of folks using a primer for the PolyUrea coatings, while there were many who used it for epoxy coatings.

In fact the BM rep kept pushing me to go with their epoxy system V155/V430/V500 which they said is DIY friendly. When I asked what specifically, he said its because the Polyurea should only be applied with a squeegee and not a roller like the epoxy. Not sure why that would make it too hard for a DIY.

Any thoughts and advice would help. TIA

TLDR: Do I need a primer coat for a PolyUrea Coating? Does a PolyUrea coating "need" to be applied with a squeegee or can it be rolled out with a paint roller?
 
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rjacobs

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First, its not recommended to diamond grind and then acid etch. One of the vendors laid out why... I think they said its because the acid can get down into the concrete to far and then it can come back to the surface later and cause damage.

Second, i put down Legacy Nohr-S which has a primer coat which is actually a 2 part epoxy then the 2 layers of Nohr-S Polyurea go on top. I believe the Epoxy can "soak" into the concrete vs. the Polyurea which doesnt really penetrate.

Third, i rolled out my 2 polyurea coats, so NO it doesnt need to be installed with a squeege.

Forth, you are on this forum, I would order from one of the vendors on here. Ive been SUPER happy with my Legacy Nohr-S floor with 3 layers.
 
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K

kelashik

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California
rjacobs said:
First, its not recommended to diamond grind and then acid etch. One of the vendors laid out why... I think they said its because the acid can get down into the concrete to far and then it can come back to the surface later and cause damage.

Second, i put down Legacy Nohr-S which has a primer coat which is actually a 2 part epoxy then the 2 layers of Nohr-S Polyurea go on top. I believe the Epoxy can "soak" into the concrete vs. the Polyurea which doesnt really penetrate.

Third, i rolled out my 2 polyurea coats, so NO it doesnt need to be installed with a squeege.

Forth, you are on this forum, I would order from one of the vendors on here. Ive been SUPER happy with my Legacy Nohr-S floor with 3 layers.
Click to expand...

Thanks a million. Yes i have started reading up on the vendors here and their offerings. Looked at AWF and SPGX, yet to check out Nohr-S. I am sure they are all great products (especially w/ the number of reviews here), so how does one differentiate? Is it on price, type of application, size (area) or type of floor?

Noted on the etch vs grinding. Super helpful tip.
 
G

Garage Flooring

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We do not suggest or recommend a primer. In rare cases of heavily damaged or really porous concrete, we would suggest a different product. That said, this works because we use a spread rate in our kits that leaves enough mil thickness. I can't speak for others systems.

We have tested a full mil Polyurea versus a thinner mil over an epoxy primer. While we can get the price down, performance suffers.
 
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K

kelashik

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Hoping for some user feedback on this question.

Looked at AWF, SPGX and Nohr-S. I dont think they can ship Nohr-S to SF bay Area. I am sure they are all great products (especially w/ the number of reviews here), so how does one differentiate? Is it on price, type of application, size (area) or type of floor? any other parameters?
 
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Garage Flooring

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kelashik said:
Hoping for some user feedback on this question.

Looked at AWF, SPGX and Nohr-S. I dont think they can ship Nohr-S to SF bay Area. I am sure they are all great products (especially w/ the number of reviews here), so how does one differentiate? Is it on price, type of application, size (area) or type of floor? any other parameters?
Click to expand...

Legacy and Armorpoxy sell great products as do we. We all have different approaches to the kits.
 
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LegacyIndustrial

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kelashik said:
Hoping for some user feedback on this question.



Looked at AWF, SPGX and Nohr-S. I dont think they can ship Nohr-S to SF bay Area. I am sure they are all great products (especially w/ the number of reviews here), so how does one differentiate? Is it on price, type of application, size (area) or type of floor? any other parameters?
Click to expand...



Nohr-S can ship to bay-area. :)



Sent from my iPhone using Garage Journal
 
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rjacobs

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kelashik said:
i dont doubt that. As a consumer, I am at a loss how to compare the three products.
Click to expand...

I only compared SPGX to Nohr-S.

Nohr-S came with an epoxy primer as part of the kit. SPGX did not. I could have bought primer for the SPGX for $150 to make the kits basically the same. SPGX kits come with a lot of the tools where as with Nohr-S their "premium tool kit" or whatever its called, was an additional $100 I think. Nohr-S had many more color options where as SPGX only had 2 choices. Anti-skid is optional in Nohr-S(with I think 3 grit levels) and standard in SPGX(I think only 1 grit level). I think all in all, both kits were similarly priced. Both manufacturers give a 5% or so discount to forum members.

As far as the products themselves, I dont think there were any major differences, chemically speaking, between them(I know I looked at the MSDS for both and dont remember anything that jumped out at me).

Ive been SUPER HAPPY with my Nohr-S floor with the fine anti-skid. I liked all the options of Nohr-S that I could fine tune what I wanted over SPGX's "take what we give you" type of kits. Not that that makes them bad, and I am sure over their history they know 99% of people order things mostly the same so they just narrow down the kits and make it easier.
 
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Armorpoxy

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Aug 18, 2013
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NJ
Hi,
We daily customize all of our kits based on customer needs and requests, so while we do offer a lot of kits, we are more than happy to customize at any time.

Also Garage Journal Members get a 15% discount from Armorpoxy!
 
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