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Old 06-20-2012, 01:03 AM   #1
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How do I remove sealant from concete basement floor


I have a concrete basement floor that had linoleum tiles (from the 1940s?) on it. I have removed the tiles. There is some glue remaining, as well as some greenish coloring (inconsistent throughout the floor). I am guessing that the green is either floor paint or sealer.

1) How can I tell what exactly it is?

2) If it is sealant, how can I remove it? Do I have to grind it off, or can it be stripped? If it can be chemically removed, product or kind of product should I use?

Thanks.

-K
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Old 06-20-2012, 01:16 AM   #2
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How do I remove sealant from concete basement floor


What are you planning to install on that floor. Depending on that, if it's bonded that well it might not have to come off.
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Old 06-20-2012, 05:31 AM   #3
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How do I remove sealant from concete basement floor


I was planning on leveling using self leveling concrete, then putting down wood laminate.
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Old 06-20-2012, 05:57 AM   #4
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How do I remove sealant from concete basement floor


That glue (black? Cutback?) should be scraped with a razor scraper to remove as much as you can--then encapsulate whats left using self leveling compound.

Follow the directions for covering cutback---

My favorite brand is Jifset and Linewebers liquid latex---follow the manufacturers directions.

Do not use chemicals to remove cutback---do not grind it off---there is often asbestos in the cutback.
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Old 06-20-2012, 06:36 AM   #5
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How do I remove sealant from concete basement floor


Per oh'mike: the glue is black, and 95+% of oit comes right up no problem. I would prefer to go chemical rather than mechanical.

I found this resource which largely answers my question:
http://www.concretenetwork.com/remov...ler/types.html

I will look for a Methylene-chloride based stripper.

Let me know if you have any further input.
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Old 06-20-2012, 06:58 AM   #6
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How do I remove sealant from concete basement floor


Did I leave out the part about 'do not use chemicals'?

Dissolving the cut back and driving the residue deep into the porous concrete is a bad plan-

Bury it under a coat of self leveling compound is the recommended method--

We have some flooring specialists here--let's see what methods other pros use--Mike--
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Old 06-20-2012, 07:05 AM   #7
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How do I remove sealant from concete basement floor


Sorry, I saw the do not grind, but totally missed the do not dissolve part of your post.

Mike, do I have to worry about adhesion problems between the self-leveling cement and the underlying layer if I do not strip it? That is my only reason for considering stripping it. If adhesion should not be a problem, should I just clean the whole thing with a degreaser, wash with water, then (after drying) apply the self leveling concrete (incluidng primer, etc)?

Thanks for your quick feedback.

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Originally Posted by oh'mike View Post
Did I leave out the part about 'do not use chemicals'?

Dissolving the cut back and driving the residue deep into the porous concrete is a bad plan-

Bury it under a coat of self leveling compound is the recommended method--

We have some flooring specialists here--let's see what methods other pros use--Mike--
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Old 06-20-2012, 07:14 AM   #8
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How do I remove sealant from concete basement floor


You will be fine if you follow the directions---a latex primer is used first and then the self leveling compound --

Of,if you use Jifset--mix with the liquid latex for the first layer and you will get a good bond--

Subsequent layers can be mixed with water.

I've never had a failure---just scrape off the heavy spots of the cutpack--sweep and vacuum and then apply the SLC---
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Old 06-20-2012, 11:47 AM   #9
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How do I remove sealant from concete basement floor


Mike, thanks for you insight thus far. However, I did the water absorbtion test (drop of water should not bead and "absorb" within 3 seconds). When done on the raw cement areas, not problem. WHen done on the sealed areas, it obviously fails. Wont that cause adhesion problems, or will the primer be enough to overcome that?

Sorry to be a PITA, and thanks for your help.

-K
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Old 06-20-2012, 02:26 PM   #10
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How do I remove sealant from concete basement floor


The primer or the latex added to the mix will bond the SLC just fine---

What manufacturer asked for an absorption test? I never heard of that from Jifset or Henry---
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Old 06-27-2012, 10:02 AM   #11
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How do I remove sealant from concete basement floor


From how you explain the substance, it is most likely a tile adhesive. If it is important for you to know exactly what it is, you can have it tested. Try your favorite home improvement store first. It should be able to provide you useful information as to the makeup of the floor.
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Old 06-28-2012, 12:07 AM   #12
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How do I remove sealant from concete basement floor


I wish there was a sarcasm font...
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