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Old 10-08-2018, 09:45 AM   #1
Northmen
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Extending Epoxy Grout

Has anyone tried this lately? I found this post by Right Angle Tile in 2014.

"One final tip is if you want to dramatically extend the pot life of your mix squirt in a little ronsonol lighter fluid as you are mixing"
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Old 10-08-2018, 10:14 AM   #2
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Never heard of it. Sounds like a terrible idea.
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Old 10-08-2018, 10:15 AM   #3
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Never heard of that.

If I wanted to extend the life of epoxy I'd put it in the freezer.
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Old 10-08-2018, 10:30 AM   #4
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The lighter fluid could also prevent the epoxy from curing properly.
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Old 10-08-2018, 12:18 PM   #5
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Old 10-08-2018, 03:43 PM   #6
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Negative...keep everything as cold as possible that is the best trick to extending pot life and working time.
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Old 10-10-2018, 05:17 PM   #7
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Reefer control

Now that I have your attention:

What about putting packets A and B in the refrigerator? That might give you an extra 20 minutes or so (to get back to room temperature)?

Another question I have: Are the contents of first and final washes known?
I would like to have a larger bucket to keep things cleaner longer.

This site remains the "go to" for tile fandom!

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Old 10-10-2018, 05:51 PM   #8
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Final wash to me smells like citric acid. Diluted vinegar works equally well.

I have been storing A&B in the fridge, too, to extend working time. It gives you a few extra minutes.
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Old 10-10-2018, 07:08 PM   #9
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One trick is to take the material out of the bucket and place it in blobs around the area. Keeping it all in the bucket means that the chemical reaction that causes the heating is concentrated...putting out blobs means that there's less material trying to get hot, and the tile's surface itself helps to keep it cool because of the thermal mass. Learned that at one of the manufacturer's training classes. You still have to spread it all before it sets up, but it will give you a bit more time, especially if the room itself (and therefore the tile) is cool. That glob in the bucket tends to act like its own insulator, keeping all of the heat in, speeding up the reaction. Divide and conquer.
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Old 10-11-2018, 02:44 PM   #10
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Chemistry is alive here...

Even as a chemistry teacher, I hadn't noticed the temperature change in the bucket (since I usually take it out with the trowel). But that is a great idea. I know when I spread the mixture on the tile that as it moves around, it's very fluid. But the bucket grout is much thicker.

Thanks for the suggestion!
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Old 10-11-2018, 03:09 PM   #11
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If you put the grout out on the floor just to separate it, you might put it on a piece of wax paper so it doesn't dry on the floor.
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Old 10-13-2018, 10:50 AM   #12
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I tried out the wax paper with good results. I also used the wax paper to wrap up the divided batches.

I used a gallon bucket of Mapei Kerepoxy CQ weighed out into 4 batches.

Kerapoxy doesn't come with any rinse additive but a little clear dish soap in a bucket of clean water left the tile clean.

The gallon bucket did 115 SQ of 12 X 24 1/8 grout joints which is less than I calculated.
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Old 10-13-2018, 02:32 PM   #13
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One cold morning I went by and bought some epoxy grout. When we got to the job we started grouting with it. The cold grout will set slower but I noticed that the grout set on the face of the tiles much faster than the joints did. With the heat on in the house, the tiles were quite warm so the grout warmed up on the face. It acted about like single component grouts. We had some scrubbing to do the next day. Something to watch for.
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