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epoxy problem

nb2841

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Aug 16, 2011
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I have coated my floor with epoxy and it looks great. But to the touch its s very rough. My concrete was fiber filled and after the first coat thefibers dryed and made it very rough. I alloyed two coats of base with sprinkles and 3I coats of clear? How do I fix it where its smooth?
 
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nb2841

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How should I sand it? What grit? Will it not mess up flakes or clear? Has anyone sanded clearbefore?
 

LegacyIndustrial

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You may be able to screen them off with a dry-wall screen.
If you sand too much you will dig into the flakes, go lightly just enough to take off the fibers and de-gloss the clear.

Clears can be sanded like this anytime you need to re-coat.

Once you have sanded you should solvent wipe the floor, dry and re-coat.
 
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nb2841

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The epoxy with fibers in it is very hard. I was thinking maybe orbital sander? The drywall screen didn't touch it, it barley scratched the clear. Any more suggestions? Thanks again
 
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nb2841

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if you get down close to the floor and look at it, it appears like grass in the epoxy.. i am thinking it needs to be sanded pretty good... any help is very thankfull
 

csp

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The fibers should have been burned off prior to applying the epoxy.

Now they are embedded in the epoxy and you're always going to see them in the clear.
 

dcs Inc

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You're going to have to sand it. Use one of these parquet floor sanders with the 12"x18" base. Use 80 grit paper. Once done, clean and apply another liberal coat of clear. You can go a harder grit but I'd start at the 80. I've used a 16 grit on a few floors. (I ran it on regular concrete first to dull it down a little). Some epoxies are softer than others...
gene ec-Indy
 
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nb2841

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I don't want to cause more harm than good, but I would like to fix it. Only about 50%the of my floor is this way. Do I sand it all? Or just bad part.
 

dcs Inc

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What kind of thickness do you have your top coat? Sand the whole area as you will need to re coat the whole slab. Don't get crazy with it and keep it moving. Lightly over the smoother area. Was the smoother area the starting point when you started applying the top coat?

gene ec-Indy
 
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nb2841

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i have no idea of the thickness.... i did 3 coats rolled. how do i clean up after sanding?
 

dcs Inc

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Vacuum several times. I use a few micro fiber mop heads with just a little denatured alcohol to dampen the head for the final sweep to pick up fine dust. Water seems to just smear it around. Keep your fiber mop moving in one directional sweep to keep the fine dust particles in front of the mop pad.

You're not wanting to sand deep, just knock off the highs so there's not going to be that much dust. You want to add a small scratch pattern which will disappear when you re-coat.

Now all of these recommendations are on my product I use. Epoxies have different hardness ratings so if what you are using is soft, it will take less effort to sand. gene ec-Indy
 
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nb2841

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what kind of sander do i need to rent? my shop is 30x30. What grit sand paper? We have several equipment rental places in town, they should have some stuff.... thanks fot he help guys
 

tncatadjuster

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Are you to where you could get a price from a floor company, while hiring out the sanding only? Clean it yourself and go.

Floor sanders(not drum)rent for around $ 45.00 a day, you would need a few (10) of the proper grit screens or sandpaper. I have used from 50 grit paper to 200 grit screen.
If you decide to do it, use new paper every few feet, keeping a proper profile over the entire floor. Good luck, keep us posted.
 

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nb2841

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What kind of companies should I loom up that would do a proper job? What is better to use for epoxy sanding, screens or sandpaper?
 

AlphaGarage

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Rent a typical floor buffer - about 170 - 200 rpm and use screens - 50 - 80 grit. Get a few of them, they'll load up or wear down pretty quickly. Clean with denatured alchohol, do not use laundered towels, you don't want any old detergents or soaps to get on the floor. Then recoat per specs of new material.

As always contact the supplier of the old existing coating to double check the process.
 
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nb2841

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going to rent sander tomorrow afternoon, any more suggestions to doing this? i am going to start with 120 grit and see how it does.... How dustey is this going to be???? thanks guys
 
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