Sherwin Williams epoxy problem

[jetranger]

Last week, I helped a friend epoxy his 800 sq ft shop. We ground and cleaned plenty, and did the rest of the prep work needed.

I tried to talk him into doing a primer, but he did not, as the manager at the local SW talked him out of it. Even on the spec sheet, it says no primer needed.

He got 3 kits (6 gallons total, 3 part A's, 3 part B's). We mixed one kit at a time, as we didn't want to have to race against the pot life. As we laid it down, there was noticeable discoloration and streaking. We thought it would go away, as the epoxy was drying a slightly darker hue that the wet stuff.

Well, here we are 4 days later, and it looks the same. He went back to the store, and the manager said "you should have mixed all six gallons in a large container so everything matched"

Any input? We plan on recoating again within a couple days. It says it can be reapplied within 7 days. Thanks!

 

[boobag]

yes, it is usually recommended to mix all paint together first. that doesnt mean you have to mix A and B together all at the same time. just mix all the A in a big bucket, then mix all the B in another bucket. then mix A and B as needed.
you especially want to do this if the paint came from different batches or is unknown.

 

[LegacyIndustrial]

Boobag nailed it....
Many vendors, especially those that support this forum, only sell batched product.
When purchasing from a retail location it is important to "Box" your A components.

The A contains the color and many times retail stores have mixed up batches.

He can coat over the floor with some pigmented urethane to square it away.

 

[jetranger]

Thanks guys. I ordered my kit from Legacy Industrial last night... Can't wait to get it!

 

[boobag]

what is your plan for the exposed conrcete foundation wall? i'd epoxy that too.

 

[Trey T]

What epoxy model did you get? How many coats did you applied?

Beside what could cause the color variation described above, color variation can be caused by not enough coating to hide the concrete color. If you did not seal your concrete using primer or first thinned-basecoat (as S-W recommends for Armorseal system) and not put down enough coating, the color will shift regardless if the paint is the same batch.

Base on your photo, it seems like there were problems during installation as the same color roller marks are scattered. If this is true, I would review the installation method again.

 

[benwah]

Color inconsistency *****. If he's going to spend more money on epoxy, instead spend that money on a polyurethane finish like Legacy mentioned and you'll be fine.

 

[Armorpoxy]

This can be correct d with a pigmented 2 part urethane topcoat like our Armorultra.

 

[alpha_numeric44]

I wish I had problems like this....

Sent from my SM-N900V using Tapatalk

 

[benwah]

alpha, what's your issue?

 

[Shea]

alpha, what's your issue?

I may be wrong, but I believe his issue is that he wished he had a nice floor with an epoxy coating to worry about....

 

[benwah]

Well hey, if that's the case - come take my job! You get to worry about other people's coating problems 6 days a week hah.

 

[noweare]

I think if you back rolled one end to the other you would of gotten a better look. It looks like (from your pics) you went back and touched up spots with the roller. When you do that it will give the touched up area a different shade.

It will not matter whose product you use if you do not back roll completely end to end.

An 18" roller will give you a better backroll because it is more even pressure. What ever roller you use overlap 50% and look at the floor to make sure any low spots have been rolled.

If you have time, back roll completely in both directions.

 

[benwah]

that's a lot of backrolling... Usually once right after spreading the coating is sufficient, other wise you'll pull the material right back onto your roller

 

[noweare]

That product has a long pot life. Once on the floor you have an even longer working time. You don't need to go both directions. But if you trying to get rid of color differences from
from different batches it would blend the color much better. Most people just don't want to see an abrupt difference as in the end of one batch and the beginning of another.