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Need Help on epoxy application

nate379

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Guys..

I am trying to figure a way to put down the epoxy without leaving strips where my "run" starts and ends.

My garage is 26x24 and it is cut so there are 4 squares. I broke each square up into roughly 1/3.

So I roll that 1/3 and go back and do the 2nd 3rd and then the 3rd. The problem is where the 1st, 2nd and 3rd meet up, it makes a thicker area that you can see.

If doesn't seem to matter if there is a wet edge or not.

What do I need to do?
 
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bmwpower

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Re: Need Help on expoxy application

Thin out the epoxy with a reducer? That or you may be getting to close to the pot life.
 
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nate379

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Re: Need Help on expoxy application

The stuff I was using today was the clear and it's got a 3hr pot life. It took me about an hr to use the whole can... and it did it right from the start.
 

Jaguar Fan

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Re: Need Help on expoxy application

Are you mixing a new batch each time (3 times for the square) or is it all one batch? If it is all one batch, did you pour it all out on the garage floor in ribbons, or did you leave it in the mixing bucket?

Can you post a picture?
 
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nate379

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Re: Need Help on expoxy application

All from the same can.

I did not pour it on the floor. Using a paint tray and roller... is that not the way to do it?
 

bmwpower

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Re: Need Help on expoxy application

Here's another possibility....what temp is the floor?
 
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nate379

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Re: Need Help on expoxy application

My infared temp gun is packed up but I would guess around 65-68 since that is the temp in teh garage and I have radiant heat.
 

bmwpower

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Re: Need Help on expoxy application

My infared temp gun is packed up but I would guess around 65-68 since that is the temp in teh garage and I have radiant heat.

If you have radiant heat and the air temp is 65-68, might the floor be hotter than that?
 
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nate379

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Re: Need Help on expoxy application

Possible. You thinking it's drying too fast because of the floor being warm? I can kill the heat and see. I have 1 square left to do and I was thinking of maybe doing another coat since I will have some left over.

I will throw up some pics tonight when I get home. Will be around midnight-1AM though.
 
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bmwpower

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Re: Need Help on expoxy application

Possible. You thinking it's drying too fast because of the floor being warm? I can kill the heat and see. I have 1 square left to do and I was thinking of maybe doing another coat since I will have some left over.

I will throw up some pics tonight when I get home. Will be around midnight-1AM though.

Yea, I was thinking that. What do the instructions on the epoxy say for temp range?
 

Jaguar Fan

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Re: Need Help on expoxy application

All from the same can.

I did not pour it on the floor. Using a paint tray and roller... is that not the way to do it?

That is NOT the best known method. From what I have learned from more experienced people here on the board, unlike paint, epoxy does not "dry." Rather, it is a chemical reaction between the part A and the part B. This chemical reaction creates heat, which in turn causes the chemical reaction to go faster, which creates more heat, etc. Because of this, leaving the mixture in the paint roller tray or in the bucket is not advised.

So, the best known method is after carefully mixing the part A and B together via the instructions (for example, mix with an electric paint mixer at 300 RPM for X minutes without drawing air into the mixture), you immediately pour it out in a ribbon on the slab. The heat generated by the chemical reaction is absorbed by the concrete mass, which in turn also cools the mixture, thereby slowing the reaction down, which gives you more time to work the mixture. However, you have to be careful not to cool it down too much, or the reaction will stall and never complete and you'll have a really disgusting gooey mess on your floor that will not harden. Because of this, you don't want to apply epoxy when it is too cold. From what you describe, you don't need to worry about that right now - it sounds like your conditions are pretty much ideal.

The last trick is DO NOT turn the bucket upside down and let it set on the slab so every last drop of epoxy comes out. If it were paint, that might be a good way to get the last half cup or so out of the bucket. Don't do that with epoxy, because the material that adheres to the bucket may not be thoroughly mixed between part A and part B, and if so, it will not cure correctly on the slab.

I defer to more experienced people, but I hope this helps in the interim.

Good luck!
 
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nate379

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Re: Need Help on expoxy application

I will give that a shot. Also going to kill the heat when I get home tonight. It's been 50-55* outside anyhow.

Here is what I'm doing....
 

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nate379

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Re: Need Help on expoxy application

Here is a pic. It doesn't come up that well with the camera but you can see one of the lines under the window if you look close.
 

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Jaguar Fan

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Re: Need Help on expoxy application

Here is a pic. It doesn't come up that well with the camera but you can see one of the lines under the window if you look close.

Yes, I can see what you're talking about.

I think to prevent that in the first place, you would need to roll each square north-south then east-west, covering the entire quadrant of your floor. That doesn't help you now, though. I think at this point, either live with it (it is a garage, after all) or add another thin coat where you roll the entire quadrant at once. On my approx. 20x20 garage, I rolled each quadrant (where the quadrant is defined by expansion joints) N-S then E-W. At that point, it looked pretty good but you could clearly see some imperfections. After adding chips, you really couldn't find the imperfections anymore even when you knew about where to look.

This doesn't help much, I'm afraid.
 
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nate379

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Re: Need Help on expoxy application

Yeah I am going to do another coat. I got my 18" roller and all the stuff so that should help me out. 9" roller is just too small for a floor IMO.
 
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nate379

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Re: Need Help on expoxy application

Ended up being the floor was too warm. I did the last section the other night and it worked out much much better. I'm going to throw down another coat (have around 1.75 gals left) with my big roller though.

Funny thing, I kicked on the heat and popped in teh garage about 45 mins later and I could see where the PEX is run in the slab because that spot was clear vs the other areas still white.
 

thegarageguy

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Re: Need Help on expoxy application

Now that you have lines on your base coat, the only way to eliminate them is to lightly sand your base with a 100 grit, solvent wipe, then use a colored poly as your final coat.

Good luck.
 
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